United States of America
[1] [2]
Flag Great Seal

"In God we trust" (official)[1][2][3]"E pluribus unum(Latin) (traditional) "Out of many, one"

Anthem: "The Star-Spangled Banner"

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Capital Washington, D.C.

38°53′N 77°01′W

Largest city New York City
Official languages None at federal level[a]
National language English[b]
Demonym American
Government Federalpresidentialconstitutional republic
 -  President Barack Obama (D)
 -  Vice President Joe Biden (D)
 -  Speaker of the House John Boehner (R)
 -  Chief Justice John Roberts
Legislature Congress
 -  Upper house Senate
 -  Lower house House of Representatives
Independence from Great Britain
 -  Declared July 4, 1776 
 -  Recognized September 3, 1783 
 -  Constitution June 21, 1788 
 -  Total 9,826,675 km2[4][c](3rd/4th)
3,794,101 sq mi
 -  Water (%) 6.76
 -  2013 estimate 317,181,000[5] (3rd)
 -  Density 34.2/km2 (179th)
88.6/sq mi
GDP (PPP) 2013 estimate
 -  Total $16.724 trillion[6] (1st)
 -  Per capita $52,839[6] (6th)
GDP (nominal) 2013 estimate
 -  Total $16.724 trillion[6] (1st)
 -  Per capita $52,839[6] (9th)
Gini (2011) 47.7[7]

high·39th (2009)

HDI (2013)  0.937[8]

very high·3rd

Currency United States dollar ($) (USD)
Time zone (UTC−5 to −10)
 -  Summer (DST)  (UTC−4 to −10[e])
Drives on the right[g]
Calling code +1
ISO 3166 code US
Internet TLD .us   .gov   .mil   .edu
a. ^ English is the official language of at least 28 states; some sources give higher figures, based on differing definitions of "official".[9] English and Hawaiian are both official languages in the state of Hawaii.
b. ^ English is the de facto language of American government and the sole language spoken at home by 80 percent of Americans aged five and older. Spanish is the second most commonly spoken language.
c. ^ Whether the United States or China is larger has been disputed. The figure given is from the U.S.Central Intelligence Agency's The World Factbook. Other sources give smaller figures. All authoritative calculations of the country's size include only the 50 states and the District of Columbia, not the territories.
d. ^ The population estimate is of people whose usual residence is within the 50 states and the District of Columbia, regardless of nationality. It does not include those living in the territories (over 4 million people, mostly in Puerto Rico).
e. ^ See Time in the United States for details about laws governing time zones in the United States.
f. ^ Does not include insular areas and United States Minor Outlying Islands, which have their own ISO 3166codes.
g. ^ Except U.S. Virgin Islands.

The United States of America (USA), commonly referred to as the United States (US),America, or simply the States, is a federal republic[10][11] consisting of 50 states, 16territories, and a federal district. The 48 contiguous states and the federal district ofWashington, D.C., are in central North America between Canada and Mexico. The state of Alaska is the northwestern part of North America and the state of Hawaii is anarchipelago in the mid-Pacific. The country also has five populated and nine unpopulatedterritories in the Pacific and the Caribbean. The largest of these territories are Puerto Ricoand the American Virgin Islands which are an official part of the United States. At 3.79 million square miles (9.83 million km2) in total and with around 316 million people, the United States is the fourth-largest country by total area and third largest bypopulation. It is one of the world's most ethnically diverse and multicultural nations, the product of large-scale immigration from many countries.[12] The geography and climate of the United States is also extremely diverse, and it is home to a wide variety of wildlife.

Paleo-indians migrated from Asia to what is now the U.S. mainland around 15,000 years ago,[13] with European colonization beginning in the 16th century. The United States emerged from 13 British colonies located along the Atlantic seaboard. Disputes between Great Britain and these colonies led to the American Revolution. On July 4, 1776, delegates from the 13 colonies unanimously issued the Declaration of Independence. Theensuing war ended in 1783 with the recognition of independence of the United States from the Kingdom of Great Britain, and was the first successful war of independence against a European colonial empire.[14][15] The current Constitution was adopted on September 17, 1787. The first 10 amendments, collectively named the Bill of Rights, were ratified in 1791 and guarantee many fundamental civil rights and freedoms.

Driven by the doctrine of manifest destiny, the United States embarked on a vigorous expansion across North America throughout the 19th century.[16] This involved displacing native tribesacquiring new territories, and gradually admitting new states.[16] TheAmerican Civil War ended legal slavery in the country.[17] By the end of the 19th century, the United States extended into the Pacific Ocean,[18] and its economy was the world's largest.[19] The Spanish–American War and World War I confirmed the country's status as a global military power. The United States emerged from World War II as a globalsuperpower, the first country with nuclear weapons, and a permanent member of theUnited Nations Security Council. The end of the Cold War and the dissolution of the Soviet Union left the United States as the sole superpower.

The United States is a developed country and has the world's largest national economy, with an estimated GDP in 2013 of $16.7 trillion – 23% of global nominal GDP and 19% atpurchasing-power parity.[6][20] The per capita GDP of the U.S. was the world's sixth-highest in 2010[6] and the U.S. has the highest mean and second-highest medianhousehold income in the OECD as well as the highest average wage.[21][22] The U.S. has the fourth most unequal income distribution among OECD nations[23][24] with roughly 16% of the population living in poverty.[25] The economy is fueled by an abundance of natural resources, a well-developed infrastructure,[26] and the world's highest worker productivity;[27] and while its economy is considered post-industrial, the U.S. continues to be one of the world's largest manufacturers.[28] The country accounts for 39% of global military spending,[29] being the foremost economic and military power, a prominent political and cultural force in the world, and a leader in scientific research and technological innovation.[30][31]


  [hide*1 Etymology


See also: Names for United States citizens

In 1507, the German cartographer Martin Waldseemüller produced a world map on which he named the lands of the Western Hemisphere "America" after the Italian explorer and cartographer Amerigo Vespucci.[32]

The first documentary evidence of the phrase "United States of America" is from a letter dated January 2, 1776, written by Stephen Moylan, Esq.George Washingon's aide-de-camp and Muster-Master General of the Continental Army. Addressed to Lt. Col. Joseph Reed, Moylan expressed his wish to carry the "full and ample powers of the United States of America" to Spain to assist in the revolutionary war effort.[33]

The first publicly published evidence of the phrase "United States of America" was in an anonymously written essay in The Virginia Gazette newspaper in Williamsburg, Virginia, on April 6, 1776.[34][35] In June 1776, Thomas Jefferson included the phrase "UNITED STATES OF AMERICA" in all capitalized letters in the headline of his "original Rough draught" of the Declaration of Independence.[36][37] In the final Fourth of July version of the Declaration, the pertinent section of the title was changed to read, "The unanimous Declaration of the thirteen united States of America".[38]

In 1777 the Articles of Confederation announced, "The Stile of this Confederacy shall be 'The United States of America'".[39]

The short form "United States" is also standard. Other common forms include the "U.S.", the "USA", and "America". Colloquial names include the "U.S. of A." and, internationally, the "States". "Columbia", a name popular in poetry and songs of the late 1700s,[40] derives its origin from Christopher Columbus; it appears in the name "District of Columbia".

The standard way to refer to a citizen of the United States is as an "American". "United States", "American" and "U.S." are used to refer to the country adjectivally ("American values", "U.S. forces"). "American" is rarely used in English to refer to subjects not connected with the United States.[41]

The phrase "United States" was originally treated as plural, a description of a collection of independent states—e.g., "the United States are"—including in the Thirteenth Amendment to the United States Constitution, ratified in 1865. It became common to treat it as singular, a single unit—e.g., "the United States is"—after the end of the Civil War. The singular form is now standard; the plural form is retained in the idiom "these United States".[42] The difference has been described as more significant than one of usage, but reflecting the difference between a collection of states and a unit.[43]

In non-English languages, the name is frequently translated as the translation of either the "United States" or "United States of America", and colloquially as "America". In addition, an initialism is sometimes used.[44]


Main articles: History of the United States and Timeline of United States history[4][5]1766 engraving of a meeting between Native Americans and Europeans===Native American and European contact===

People from Asia migrated to the North American continent approximately 15,000 or more years ago.[45][46] Some, such as the pre-Columbian Mississippian culture, developed advanced agriculture, grand architecture, and state-level societies. After European explorers and traders made the first contacts, it is estimated that their population declined due to various reasons, including diseases such as smallpox andmeasles to which indigenous Americans had no natural immunities,[47][48]intermarriage,[49] and violence.[50][51][52]

In the early days of colonization many settlers were subject to shortages of food, disease and attacks from native Indians. Indians were also often at war with neighboring tribes and would often enslave their defeated enemy, a practice that was also soon used by various colonists who captured Indians in battle. During the various colonial wars, many colonists were also captured by Indians as slaves and taken north to Canada and sold to the French.[53]

At the same time however many natives and settlers got along and came to depend on each other, especially settlers during the winter months. Natives also came to depend on settlers for guns, ammunition, powder and other modern devices. Because many tribes were frequently at war with one another it became imperative to establish and secure good relationships with at least one group of colonists. As colonists began to spread out into the interior their contact with native Indians increased, sometimes resulting in good relations, oftentimes resulting in conflict. In the process "Native American influenced colonist, and colonist influenced Native American".[54]

Natives taught many settlers where, when and how to hunt and fish in the vast frontier that lay before them whose elements were generally unknown to the Europeans. In order to survive settlers often depended on native Indians who taught them how to adopt to the Indian's "hunting culture" and learned the use of animal skins as camouflage, decoys along with various whistles and calls used to attract prey. European ministries and others felt it was important to "civilize" the Indians and urged them to concentrate on farming and ranching and not depend primarily on hunting and gathering. At the same time Indians offered the benefit of their experience in growing corn, an unknown crop in Europe, and in the use of dead fish and other methods as fertilizer. It was not long before many Indians began to grow new crops and raise livestock and poultry in their communities and made use of the various living utilities settlers had to offer.[55][56]

Initially the Puritan and Wampanoag were peaceful, but the King Philip's War broke out following cultural and religious differences between the colonists and the Wampanoag;[57][58] by the war's end, the European colonists had defeated the Native Americans and were able to expand and control New England.[59] In Carolina, Native Americans were captured and sold into slavery to both New England and the West Indies. In 1676, the Virginia colony legally sanctioned the enslavement of Native Americans.[60] Conversely, theFive Civilized Tribes were involved in the institution of African slavery as planters.[61]


[6][7]The signing of the Mayflower Compact, 1620.Further information: European colonization of the Americas and 13 colonies

After Columbus' discovery of the New World in 1492 other explorers followed.[62] The first Spanish explorers landed in "La Florida" in 1513. Conquistadors explored much of the continent's interior and Spain later set up some settlements in parts of Florida and the American southwest that were eventually merged into the United States.[63] There were also some French attempts to colonize the east coast, and later more successful settlements along the Mississippi River. Many early European colonies failed due to starvation, disease, harsh weather, Native American attacks, or warfare with European rivals. The fate of the "lost" English colony of Roanoke in the 1580s is an enduring mystery.

James I on April 10, 1606, chartered The Virginia Company with the purpose of establishing English settlements on the eastern coast of North America. The Virginia Colony was planted in 1607 with Jamestown and the PilgrimsPlymouth Colony in 1620. Both colonies suffered initial hardships and great loss of life, but eventually stabilized and became the first successful English settlements in America. Both also saw efficiency greatly improve when personal property replaced the early communal operations.[64] The continent's first elected legislative assembly, Virginia's House of Burgesses created in 1619, and the Mayflower Compact, signed by the Pilgrims before disembarking, established precedents for the pattern of representative self-government and constitutionalism that would develop throughout the American colonies.[65][66] Tens of thousands of Puritans later settled New England.

Other New England colonies were established. Much of the territory between them and Virginia was controlled by the Dutch until England seized it in the late 17th century during the Anglo-Dutch Wars, leading to the creation of the Middle Colonies.[67] Trade with and Christian evangelism to local tribes of native peoples were established in the colonies' early days, though relations would alternate from friendly to tense, and were characterized by periodic bouts of warfare, often with some tribes allying themselves with the English against common foes. Incidents like the massacre of 1622, the Pequot War, and King Philip's War caused great destruction and threatened the existence of entire colonies, but resulted in reprisals that ultimately saw the power of enemy tribes reduced or broken, facilitating the expansion of English settlements.[68][69]

Most settlers in every colony were small farmers, but other industries developed. Tobacco was popular in Europe and became a major early cash crop. Furs, fishing, lumber, rum, rice, indigo, construction, wheat, ranching, and eventually shipbuilding contributed to economic growth. By the late colonial period Americans were producing one-seventh of the world's iron supply.[70] Cities eventually dotted the coast to support local economies and serve as trade hubs. English colonists were supplemented by waves of Scotch-Irishand other groups. As coastal land grew more expensive people pushed west into the hills and backwoods, seeking to carve an existence out of virgin wilderness.[71]

[8][9]Penn's Treaty between the Quaker settlers and Native Americans was never violated during William Penn's lifetime.

Settlers were a diverse mix of adventurers, profit seekers, people wanting religious freedom, and those who simply saw an opportunity for a better life.[72] Many came asindentured servants, either convicts or people who otherwise could not afford passage voluntarily signing contracts, and were set free after completing their specified term of service. Two-thirds of all Virginia settlers between 1630 and 1680 arrived indentured.[73]

The first African slaves were brought to the Americas by Spanish conquistadors in the 1500s shortly after Columbus' voyages. Most slaves were shipped to sugar colonies in the Caribbean and to Brazil, where life expectancy was about seven years.[74] Life expectancy was much higher in North America because of less disease and better food and treatment, so the numbers of slaves grew rapidly into the millions by excesses of births over deaths.[75][76]

Colonial society was largely divided over the religious and moral implications of slavery and many colonies passed acts for and against the practice.[77][78] By the turn of the 18th century, African slaves were becoming the primary source of bonded labor in many regions.[79] Some colonists participated in the lucrative, slave oriented "Golden Triangle", involving planters, merchants of various types, shippers, and the African tribal chiefs whoprovided them with slaves.[60][80]

With the 1729 division of the Carolinas and the 1732 colonization of Georgia, the 13 colonies that would become the United States of America were established.[81] All had local governments with elections open to most free men, with a growing devotion to the ancientrights of Englishmen and a sense of self-government stimulating support for republicanism.[82] With extremely high birth rates, low death rates, and steady settlement, the colonial population grew rapidly. Relatively small Native American populations were eclipsed.[83] The Christian revivalist movement of the 1730s and 1740s known as the Great Awakening fueled interest in both religion and religious liberty.

In the French and Indian War, British forces seized Canada from the French, but the francophone population remained politically isolated from the southern colonies. Excluding the Native Americans, who were being conquered and displaced, those 13 colonies had a population of over 2.1 million in 1770, about one-third that of Britain. Despite continuing new arrivals, the rate of natural increase was such that by the 1770s only a small minority of Americans had been born overseas.[84] The colonies' distance from Britain had allowed the development of self-government, but their success motivated monarchs to periodically seek to reassert Royal authority.

Independence and expansionEdit

Further information: American Revolutionary WarDeclaration of Independence, and American Revolution[10][11]The Declaration of Independence: theCommittee of Five presenting their draft to theSecond Continental Congress in 1776.

The American Revolution was the first successful colonial war of independence against a European power. Americans had developed a democratic system of local government and an ideology of "republicanism" that held government rested on the will of the people (not the king), which strongly opposed corruption and demanded civic virtue. They demanded their rights as Englishmen and rejected British efforts to impose taxes without the approval of colonial legislatures. The British insisted and the conflict escalated to full-scale war in 1775, the American Revolutionary War.[85] On June 14, 1775, the Continental Congress, convening in Philadelphia, established a Continental Army under the command of George Washington.[86] Proclaiming that "all men are created equal" and endowed with "certain unalienable Rights", the Congress adopted the Declaration of Independence, drafted largely by Thomas Jefferson, on July 4, 1776. That date is now celebrated annually as America's Independence Day. In 1777, theArticles of Confederation established a weak government that operated until 1789.[87]

After a naval victory followed by the British defeat at Yorktown by American forces assisted by the French,[88] the United States was independent. In the peace treaty of 1783 Britain recognized American sovereignty over most territory east of the Mississippi River. Nationalists calling for a much stronger federal government with powers of taxation led the constitutional convention in 1787. After intense debate in state conventions the United States Constitution was ratified in 1788. The first Senate, House of Representatives, andpresident—George Washington—took office in 1789. The Bill of Rights, forbidding federal restriction of personal freedoms and guaranteeing a range of legal protections, was adopted in 1791.[89]

Attitudes toward slavery were shifting; nearly all states officially outlawed the international slave trade before the federal government criminalized it in 1808.[90] Slavery had become more pronounced in the south than the north because the land there was better suited for large scale cash crop cultivation than the rocky ground and cooler climate of New England.[91][92] All the Northern states abolished slavery between 1780 and 1804, leaving the slave states of the South as defenders of the "peculiar institution". With cotton a highly profitable plantation crop after 1820, slave interests in the Southern states maintained that slavery was a positive good for everyone, including the slaves.[93] The Second Great Awakening, beginning about 1800, converted millions to evangelical Protestantism. In the North it energized multiple social reform movements, including abolitionism.[94]

[12][13]U.S. territorial acquisitions–portions of each territory were granted statehood over time

Americans' eagerness to expand westward prompted a long series of Indian Wars.[95]The Louisiana Purchase of French-claimed territory under President Thomas Jefferson in 1803 almost doubled the nation's size.[96] The War of 1812, declared against Britain over various grievances and fought to a draw, strengthened U.S. nationalism.[97] A series of U.S. military incursions into Florida led Spain to cede it and other Gulf Coast territory in 1819.[98]

President Andrew Jackson took office in 1829, and began a set of reforms which led to the era of Jacksonian democracy, which is considered to have lasted from 1830 to 1850. This included many reforms, such as wider male suffrage, and various adjustments to the power of the Federal government. This also led to the rise of theSecond Party System, which refers to the dominant parties which existed from 1828 to 1854.

The Trail of Tears in the 1830s exemplified the Indian removal policy that moved Indians to their own reservations, sometimes by force, with small annual government subsidies. The United States annexed the Republic of Texas in 1845, amid a period when the concept ofManifest Destiny was becoming popular.[99] The 1846 Oregon Treaty with Britain led to U.S. control of the present-day American Northwest.[100] The U.S. victory in the Mexican-American War resulted in the 1848 cession of California and much of the present-dayAmerican Southwest.[101]

The California Gold Rush of 1848–49 further spurred western migration.[102] New railways made relocation easier for settlers and increased conflicts with Native Americans.[103] Over a half-century, up to 40 million American bison, or buffalo, were slaughtered for skins and meat and to ease the railways' spread.[104] The loss of the buffalo, a primary resource for the plains Indians, was an existential blow to many native cultures.[104] In 1869, President Ulysses S. Grant's Peace policy reversed the previous costly policy of "wars of extermination" in order to civilize and give Indians eventual United State citizenship having incorporated Indians as wards of the state, led by a philanthropic Board of Indian Commissioners.[105]

Civil War and Reconstruction EraEdit

[14][15]Battle of GettysburgPennsylvania. The Civil War cemented the Union and spurred the steel industry and intercontinental railroad construction.Further information: American Civil War and Reconstruction Era

Starting in the 1780s inherent divisions between the North and the South in American society over slavery ultimately led to the American Civil War.[106] Initially, the Foundersof the nation had been able to keep the Union solvent by compromises worked out at the Constitutional Convention and to remain a single nation.[106]

During the years leading up to the American Civil War tensions between slave and free states mounted with arguments about the relationship between the state and federal governments, as well as violent conflicts over the spread of slavery into new states.[107]Abraham Lincoln, candidate of the largely antislavery Republican Party, was elected president in 1860.[108] Before he took office, seven slave states declared their secession—which the federal government maintained was illegal—and formed theConfederate States of America.[109]

With the Confederate attack upon Fort Sumter, the Civil War began and four more slave states joined the Confederacy.[109] Lincoln'sEmancipation Proclamation in 1863 declared slaves in the Confederacy to be free, though not those in Union slave states. Following theUnion victory in 1865, three amendments to the U.S. Constitution ensured freedom for the nearly four million African Americans who had been slaves,[110] made them citizens, and gave them voting rights. The war and its resolution led to a substantial increase infederal power.[111] The war remains the deadliest conflict in American history, resulting in the deaths of 620,000 soldiers.[112]

The assassination of Abraham Lincoln radicalized Republican Reconstruction policies aimed at reintegrating and rebuilding the Southern states while ensuring the rights of the newly freed slaves.[113] President Ulysses S. Grant implemented the Department of Justice and used the U.S. Military to enforce suffrage and civil rights for African Americans in the South destroying the Ku Klux Klan in 1871 under the Force Acts.[114] The resolution of the disputed 1876 presidential election by the Compromise of 1877 ended Reconstruction; Jim Crow laws soon disenfranchised many African Americans.[113]


[16][17]Ellis Island, New York City. East Coastimmigrants worked in factories, railroads, and mines, and created demand for industrialized agriculture.

In the North, urbanization and an unprecedented influx of immigrants from Southern and Eastern Europe hastened the country's industrialization. The wave of immigration,lasting until 1924, provided labor and transformed American culture.[115] United States immigration policies were Eurocentric, which barred Asians from naturalization, and restricted their immigration beginning with the Chinese Exclusion Act in 1882.[116]National infrastructure development spurred economic growth. The end of the Civil War spurred greater settlement and development of the American Old West. This was due to a variety of social and technological developments, including the completion of theFirst Transcontinental Telegraph in 1861 and the First Transcontinental Railroad in 1869.

The 1867 Alaska Purchase from Russia completed the country's mainland expansion. The Wounded Knee Massacre in 1890 was the last major armed conflict of the Indian Wars. In 1893, the indigenous monarchy of the Pacific Kingdom of Hawaii was overthrown in a coup led by American residents; the United States annexed the archipelago in 1898. Victory in the Spanish–American War the same year demonstrated that the United States was a world power and led to the annexation of Puerto RicoGuam, and the Philippines.[117] The Philippines gained independence a half-century later; Puerto Rico and Guam remain U.S. territories.

The emergence of many prominent industrialists at the end of the 19th century gave rise to the Gilded Age, a period of growing affluence and power among the business class. The hardships the working classes experienced during this period led to the rise of anarchist andsocialist movements in the U.S.[118] In 1914 alone, 35,000 workers died in industrial accidents and 700,000 were injured.[119] This period eventually ended with the beginning of the Progressive Era, a period of significant reforms in many societal areas, including regulatory protection for the public, greater antitrust measures, and attention to living conditions for the working classes. PresidentTheodore Roosevelt was one leading proponent of progressive reforms.

World War I, Great Depression, and World War IIEdit

Further information: World War IGreat Depression, and World War II

At the outbreak of World War I in 1914, the United States remained neutral. Most Americans sympathized with the British and French, although many opposed intervention.[120] In 1917, the United States joined the Allies, and the American Expeditionary Forces helped to turn the tide against the Central Powers. President Woodrow Wilson took a leading diplomatic role at the Paris Peace Conference of 1919 which helped to shape the post-war world. Wilson advocated strongly for the U.S. to join the League of Nations. However, the Senate refused to approve this, and did not ratify the Treaty of Versailles, which established the League of Nations.[121]

[18]The Dust Bowl brought agricultural depression, impacted industrial markets, and led to large relocation out of the Great Plains.[19]WWII invasion of Europe required war industry, accelerating migration to big cities and large scale manufacturing

The country pursued a policy of unilateralism, verging on isolationism.[121] In 1920, the women's rights movement, led by Carrie Chapman Catt, won passage of a constitutional amendment granting women's suffrage.[122] The prosperity of the Roaring Twentiesended with the Wall Street Crash of 1929 that triggered the Great Depression.

After his election as president in 1932, Franklin D. Roosevelt responded with the New Deal, a range of policies increasing government intervention in the economy, including the establishment of the Social Security system.[123] The Dust Bowl of the mid-1930s impoverished many farming communities and spurred a new wave of western migration.

The United States, effectively neutral during World War II's early stages after Nazi Germany's invasion of Poland in September 1939, began supplying material to the Allies in March 1941 through the Lend-Lease program. On December 7, 1941, the Empire of Japan launched a surprise attack on Pearl Harbor, prompting the United States to join the Allies against the Axis powers as well as theinternment of Japanese Americans by the thousands.[124] Participation in the war spurred capital investment and industrial capacity, and the production figures after the Americans started to unfold the awesome productive capacity of their economy became the stuff of legend.[125] Though the nation lost more than 400,000 soldiers,[126] among the major combatants, the United States was the only nation to become richer because of the war.[127]

Allied conferences at Bretton Woods and Yalta outlined a new system of international organizations that placed the United States andSoviet Union at the center of world affairs. As victory was won in Europe, a 1945 international conference held in San Franciscoproduced the United Nations Charter, which became active after the war.[128] The United States, having developed the first nuclear weapons, used them on the Japanese cities of Hiroshima and Nagasaki in August. Japan surrendered on September 2, ending the war.[129]

Cold War and Civil Rights eraEdit

[20]Civil Rights leaders, including Ralph Abernathy andMartin Luther King, Jr., lead one of the Selma to Montgomery marches[21]A vehicle enters West Berlin through the Western Allies' Checkpoint Charlie after the fall of the Berlin Wall, marking the beginning of the end of the Cold War

The United States and the Soviet Union jockeyed for power after World War II during the Cold War, dominating the military affairs of Europe through NATOand the Warsaw Pact, respectively. While they engaged in proxy wars and developed powerful nuclear arsenals, the two countries avoided direct military conflict. The U.S. often opposed Third World left-wing movements that it viewed as Soviet-sponsored. American troops foughtCommunist Chinese and North Koreanforces in the Korean War of 1950–53. TheHouse Un-American Activities Committeepursued a series of investigations into suspected leftist subversion, while Senator Joseph McCarthy became the figurehead of anticommunist sentiment.[130]

The 1961 Soviet launch of the first manned spaceflight prompted President John F. Kennedy's call for the United States to be first to land "a man on the moon", achieved in 1969.[131] Kennedy also faced a tense nuclear showdown with Soviet forces in Cuba.[132]Meanwhile, the United States experienced sustained economic expansion. Amidst the presence of various white nationalist groups, particularly the Ku Klux Klan, a growing civil rights movement used nonviolence to confront segregation and discrimination. This was symbolized and led by black Americans such as Rosa Parks and Martin Luther King, Jr. On the other hand, some black nationalistgroups such as the Black Panther Party and Malcolm X had a more militant scope.

Following Kennedy's assassination in 1963, the Civil Rights Act of 1964Voting Rights Act of 1965, and Immigration and Nationality Act of 1965 were passed under President Lyndon B. Johnson.[133] He also signed into law the Medicare and Medicaid programs.[134]Johnson also expanded a proxy war in Southeast Asia into the ultimately unsuccessful Vietnam War. A widespread countercultural movement grew, fueled by opposition to the warblack nationalism, and the sexual revolutionBetty FriedanGloria Steinem, and others led a new wave of feminism that sought political, social, and economic equality for women.

In the 1970s, the American economy was hurt by two major energy shocks. The Nixon Administration restored normal relations withChina and oversaw the beginning of a period of generally eased relations with the Soviet Union. As a result of the Watergate scandal, in 1974 Nixon became the first U.S. president to resign, to avoid being impeached on charges including obstruction of justice and abuse of power. The Carter Administration of the late 1970s was marked by the Iran hostage crisisstagflation, and an increase of tensions with the Soviet Union following the Soviet intervention in Afghanistan. The election of Ronald Reagan as president in 1980 heralded arightward shift in American politics,[135][136][137][138] reflected in major changes in taxation and spending priorities.[139] His second term in office brought both the Iran–Contra scandal and significant diplomatic progress with the Soviet Union.[140] The subsequent Soviet collapse ended the Cold War.[141][142][143] [144][145]

Contemporary eraEdit

[22][23]September 11, 2001 attacks on theWorld Trade Center in New York City.

Under President George H. W. Bush, the United States took a lead role in the UN–sanctioned Gulf War.[146] The longest economic expansion in modern U.S. history—from March 1991 to March 2001—encompassed the Bill Clinton administration and the dot-com bubble.[147]

On September 11, 2001al-Qaeda terrorists under the leadership of Osama bin Laden struck the World Trade Center in New York City and The Pentagon near Washington, D.C., killing nearly 3,000 people.[148] In response, the George W. Bush administration launched the global War on Terrorinvading Afghanistan and removing the Taliban government and al-Qaeda training camps.[149] However, Taliban insurgents were never completely defeated and continue to fight a guerrilla war against U.S. forces.[150] In 2003, the United States and several allied forces launched an invasion of Iraq to engineer regime change there, beginning the Iraq War. American combat troops fought in the country for eight years.[151][152][153]

In 2008, amid a global economic recession and two wars, the first African-American president, Barack Obama, was elected.[154] In 2011, Osama Bin Laden was killed during an American Navy SEAL raid on his compound in AbbottabadPakistan.[155]

Geography, climate, and environmentEdit

Main articles: Geography of the United StatesClimate of the United States, and Environment of the United States[24][25]A composite satellite image of the contiguous United States

The land area of the contiguous United States is 2,959,064 square miles (7,663,941 km2). Alaska, separated from the contiguous United States by Canada, is the largest state at 663,268 square miles (1,717,856 km2). Hawaii, occupying an archipelago in the centralPacific, southwest of North America, is 10,931 square miles (28,311 km2) in area.[156]

The United States is the world's third or fourth largest nation by total area (land and water), ranking behind Russia and Canada and just above or below China. The ranking varies depending on how two territories disputed by China and India are counted and how the total size of the United States is measured: calculations range from 3,676,486 square miles (9,522,055 km2)[157] to 3,717,813 square miles (9,629,091 km2)[158] to 3,794,101 square miles (9,826,676 km2).[4] Measured by only land area, the United States is third in size behind Russia and China, just ahead of Canada.[159]

The coastal plain of the Atlantic seaboard gives way further inland to deciduous forests and the rolling hills of the Piedmont. TheAppalachian Mountains divide the eastern seaboard from the Great Lakes and the grasslands of the Midwest. The MississippiMissouri River, the world's fourth longest river system, runs mainly north–south through the heart of the country. The flat, fertile prairie of theGreat Plains stretches to the west, interrupted by a highland region in the southeast.

[26][27]Bald Eagle, the national bird of the United States since 1782.

The Rocky Mountains, at the western edge of the Great Plains, extend north to south across the country, reaching altitudes higher than 14,000 feet (4,300 m) in Colorado. Farther west are the rocky Great Basin and deserts such as the Chihuahua and Mojave. The Sierra Nevada and Cascade mountain ranges run close to the Pacific coast, both ranges reaching altitudes higher than 14,000 feet (4,300 m). The lowest and highest points in the continentalUnited States are in the state of California, and only about 80 miles (130 km) apart. At 20,320 feet (6,194 m), Alaska's Mount McKinley is the tallest peak in the country and in North America. Active volcanoes are common throughout Alaska's Alexander and Aleutian Islands, and Hawaii consists of volcanic islands. The supervolcano underlying Yellowstone National Park in the Rockies is the continent's largest volcanic feature.[160]

The United States, with its large size and geographic variety, includes most climate types. To the east of the 100th meridian, the climate ranges from humid continental in the north tohumid subtropical in the south. The southern tip of Florida is tropical, as is Hawaii. The Great Plains west of the 100th meridian are semi-arid. Much of the Western mountains arealpine. The climate is arid in the Great Basin, desert in the Southwest, Mediterranean incoastal California, and oceanic in coastal Oregon and Washington and southern Alaska. Most of Alaska is subarctic or polar. Extreme weather is not uncommon—the states bordering the Gulf of Mexico are prone to hurricanes, and most of the world's tornadoesoccur within the country, mainly in the Midwest's Tornado Alley.[161]

The U.S. ecology is considered "megadiverse": about 17,000 species of vascular plants occur in the contiguous United States and Alaska, and over 1,800 species of flowering plants are found in Hawaii, few of which occur on the mainland.[162] The United States is home to more than 400 mammal, 750 bird, and 500 reptile and amphibian species.[163] About 91,000 insect species have been described.[164]

There are 58 national parks and hundreds of other federally managed parks, forests, and wilderness areas.[165] Altogether, the government owns 28.8% of the country's land area.[166][dead link] Most of this is protected, though some is leased for oil and gas drilling, mining, logging, or cattle ranching; 2.4% is used for military purposes.[166][dead link][167][168]

Environmental issuesEdit

Main articles: Environmental issues in the United States and Conservation movement#United States

Environmental issues have been on the national agenda since 1970. Environmental controversies include debates on oil and nuclear energy, dealing with air and water pollution, the economic costs of protecting wildlife, logging and deforestation,[169][170] and international responses to global warming.[171][172] Many federal and state agencies are involved. The most prominent is theEnvironmental Protection Agency (EPA), created by presidential order in 1970.[173] The idea of wilderness has shaped the management of public lands since 1964, with the Wilderness Act.[174] The Endangered Species Act of 1973 is intended to protect threatened and endangered species and their habitats, which are monitored by the United States Fish and Wildlife Service.


Main articles: Demographics of the United StatesAmericans, and List of United States cities by population===Population=== [28][29]Largest ancestry groups by county, 2000

(as given by the 2010 Census)[175]
By race:
White 72.4%
African American 12.6%
Asian 4.8%
American Indian and Alaska Native 0.9%
Native Hawaiian and Pacific Islander 0.2%
Other 6.2%
Multiracial (2 or more) 2.9%
By ethnicity:[176]
Hispanic/Latino (of any race) 16.3%
Non-Hispanic/Latino (of any race) 83.7%

The U.S. Census Bureau estimates the country's population now to be 317,181,000,[5] including an approximate 11.2 million illegal aliens.[177] The U.S. population almost quadrupled during the 20th century, from about 76 million in 1900.[178] The third most populous nation in the world, after China andIndia, the United States is the only major industrialized nation in which large population increases are projected.[179]

With a birth rate of 13 per 1,000, 35% below the world average, its population growth rate is positive at 0.9%, significantly higher than those of many developed nations.[180] In fiscal year 2012, over one million immigrants (most of whom entered throughfamily r eunification) were granted legal residence.[181] Mexico has been the leading source of new residents for over two decades; since 1998,China, India, and the Philippines have been in the top four sending countries every year.[182][183] Nine million Americans identify as homosexualbisexualor transgender, making up less than four percent of the population.[184] A 2010 survey found that seven percent of men and eight percent of women identified as gay, lesbian or bisexual.[185]

The United States has a very diverse population—31 ancestry groups have more than one million members.[186] White Americans are the largest racial groupGerman Americans,Irish Americans, and English Americans constitute three of the country's four largest ancestry groups.[186] Black Americans are the nation's largest racial minority and third largest ancestry group.[186] Asian Americans are the country's second largest racial minority; the three largest Asian American ethnic groups are Chinese AmericansFilipino Americans, and Indian Americans.[186]

In 2010, the U.S. population included an estimated 5.2 million people with some American Indian or Alaska Native ancestry (2.9 million exclusively of such ancestry) and 1.2 million with some native Hawaiian or Pacific island ancestry (0.5 million exclusively).[187] The census counted more than 19 million people of "Some Other Race" who were "unable to identify with any" of its five official race categories in 2010.[187]

The population growth of Hispanic and Latino Americans (the terms are officially interchangeable) is a major demographic trend. The 50.5 million Americans of Hispanic descent[187] are identified as sharing a distinct "ethnicity" by the Census Bureau; 64% of Hispanic Americans are of Mexican descent.[188] Between 2000 and 2010, the country's Hispanic population increased 43% while the non-Hispanic population rose just 4.9%.[175] Much of this growth is from immigration; in 2007, 12.6% of the U.S. population was foreign-born, with 54% of that figure born in Latin America.[189]

Fertility is also a factor; in 2010 the average Hispanic (of any race) woman gave birth to 2.35 children in her lifetime, compared to 1.97 for non-Hispanic black women and 1.79 for non-Hispanic white women (both below the replacement rate of 2.1).[190] Minorities (as defined by the Census Bureau as all those beside non-Hispanic, non-multiracial whites) constituted 36.3% of the population in 2010,[191] and over 50% of children under age one,[192] and are projected to constitute the majority by 2042.[193] This contradicts the report by the National Vital Statistics Reports, based on the U.S. census data, which concludes that, 54% (2,162,406 out of 3,999,386 in 2010) of births were non-Hispanic white.[190]

About 82% of Americans live in urban areas (including suburbs);[4] about half of those reside in cities with populations over 50,000.[194]In 2008, 273 incorporated places had populations over 100,000, nine cities had more than one million residents, and four global citieshad over two million (New York CityLos AngelesChicago, and Houston).[195]

There are 52 metropolitan areas with populations greater than one million.[196] Of the 50 fastest-growing metro areas, 47 are in the West or South.[197] The metro areas of Dallas, Houston, Atlanta, and Phoenix all grew by more than a million people between 2000 and 2008.[196]

Leading population centers (see complete list) *view
Rank Core city (cities) Metro area population Metropolitan Statistical Area Region[198]

[30] New York City

[31] Los Angeles

[32] Chicago

1 New York City 19,015,900 New York–New Jersey–Connecticut–Pennsylvania, NY–NJ–CT–PA MSA Northeast
2 Los Angeles 12,944,801 Los Angeles–Long Beach–Santa Ana, CA MSA West
3 Chicago 9,504,753 Chicago–Joliet–Naperville, IL–IN–WI MSA Midwest
4 Dallas–Fort Worth 6,526,548 Dallas–Fort Worth–Arlington, TX MSA South
5 Houston 6,086,538 Houston–The Woodlands-Sugar Land MSA South
6 Philadelphia 5,992,414 Philadelphia–Camden–Wilmington, PA–NJ–DE–MD MSA Northeast
7 Washington, D.C. 5,703,948 Washington, DC–VA–MD–WV MSA Northeast
8 Miami 5,670,125 Miami–Fort Lauderdale–Pompano Beach, FL MSA South
9 Atlanta 5,359,205 Atlanta–Sandy Springs–Marietta, GA MSA South
10 Boston 4,591,112 Boston–Cambridge–Quincy, MA–NH MSA Northeast
11 San Francisco 4,391,037 San Francisco–Oakland–Fremont, CA MSA West
12 San Bernardino-Riverside 4,304,997 San Bernandino–Riverside–Ontario, CA MSA West
13 Detroit 4,285,832 Detroit–Warren–Livonia, MI MSA Midwest
14 Phoenix 4,263,236 Phoenix–Mesa–Glendale, AZ MSA West
15 Seattle 3,500,026 Seattle–Tacoma–Bellevue, WA MSA West
16 Minneapolis–St. Paul 3,318,486 Minneapolis–St. Paul–Bloomington, MN–WI MSA Midwest
17 San Diego 3,140,069 San Diego–Carlsbad–San Marcos, CA MSA West
18 Tampa–St. Petersburg 2,824,724 Tampa–St. Petersburg–Clearwater, FL MSA South
19 St. Louis 2,817,355 St. Louis–St. Charles–Farmington, MO–IL MSA Midwest
20 Baltimore 2,729,110 Baltimore–Towson, MD MSA Northeast
based upon 2011 population estimates from the U.S. Census Bureau[199]


Main article: Languages of the United StatesSee also: Language Spoken at Home and List of endangered languages in the United States

Languages spoken by more than 500,000 in the United States[200]

(as of 2010)

Percentage of population Number of speakers
English 80.38% 233,780,338
Combined total of all languages other than English 19.62% 57,048,617
Spanish (excluding Puerto Rico's total and Spanish Creole) 12.19% 35,437,985
Chinese (including Cantonese and Mandarin) 0.89% 2,567,779
Tagalog 0.53% 1,542,118
Vietnamese 0.44% 1,292,448
French 0.44% 1,288,833
Korean 0.38% 1,108,408
German 0.38% 1,107,869
Russian 0.29% 836,171
Arabic 0.26% 764,753
Italian 0.26% 764,326
Portuguese (excluding Portuguese Creole) 0.24% 684,493
French Creole (including Haitian CreoleLouisiana Creole, etc.) 0.23% 663,828
Polish 0.21% 604,234
Hindi 0.20% 586,173

English (American English) is the de facto national language. Although there is no official language at the federal level, some laws—such as U.S. naturalization requirements—standardize English. In 2010, about 230 million, or 80% of the population aged five years and older, spoke only English at home. Spanish, spoken by 12% of the population at home, is the second most common language and the most widely taught second language.[201][202] Some Americans advocate making English the country's official language, as it is in at least 28 states.[9]

Both Hawaiian and English are official languages in Hawaii, by state law.[203] While neither has an official language, New Mexico has laws providing for the use of both English and Spanish, as Louisiana does for English and French.[204] Other states, such as California, mandate the publication of Spanish versions of certain government documents including court forms.[205] Many jurisdictions with large numbers of non-English speakers produce government materials, especially voting information, in the most commonly spoken languages in those jurisdictions.

Several insular territories grant official recognition to their native languages, along with English: Samoan and Chamorro are recognized by American Samoa and Guam, respectively; Carolinian and Chamorro are recognized by the Northern Mariana Islands; Spanish is an official language of Puerto Rico and is more widely spoken than English there.[citation needed]


Main article: Religion in the United StatesSee also: History of religion in the United StatesFreedom of religion in the United StatesSeparation of church and state in the United States, and List of religious movements that began in the United States[34][35]A pie chart of religious groups in the U.S. (2007)[36][37]The area roughly considered to constitute the Bible Belt

The First Amendment of the U.S. Constitution guarantees the free exercise of religion and forbids Congress from passing laws respecting its establishmentChristianity is by far the most common religion practiced in the U.S., but other religions are followed, too.

In a 2002 study, 59% of Americans said that religion played a "very important role in their lives", a far higher figure than that of any other wealthy nation.[206]

In a 2009 Gallup poll, 42% of Americans said that they attended church weekly or almost weekly; the figures ranged from a low of 23% in Vermont to a high of 63% in Mississippi.[207]

According to a 2007 survey, 78.4% of adults identified themselves asChristian,[208] down from 86.4% in 1990.[209] Protestant denominations accounted for 51.3%, while Roman Catholicism, at 23.9%, was the largest individual denomination.[208] The total reporting non-Christian religions in 2007 was 4.7%, up from 3.3% in 1990.[209] Other religions include Judaism (1.7%),Buddhism (0.7%), Islam (0.6%), Hinduism (0.4%), and Unitarian Universalism(0.3%).[208] The survey also reported that 16.1% of Americans described themselves as agnosticatheist, or simply having no religion, up from 8.2% in 1990.[208][209][210] There are also Baha'iSikhJainShintoConfucianTaoist,DruidNative AmericanWiccanhumanist and deist communities.[211]

Protestantism is the largest group of religions in the United States, with Baptists being the largest Protestant sect, and the Southern Baptist Convention being the largest Protestant denomination in the U.S. Roman Catholicism in the U.S. has its origin in the Spanish and French colonization of the Americas, and later grew due to Irish, Italian, Polish, German and Hispanic immigration. Rhode Island is the only state where the majority of the population is Catholic. Lutheranism in the U.S. has its origin in immigration from Northern Europe. North and South Dakota are the only states in which a plurality of the population is Lutheran. Utah is the only state where Mormonism is the religion of the majority of the population. Mormonism is also relatively common in parts of Idaho, Nevada and Wyoming.

The Bible Belt is an informal term for a region in the Southern United States in which socially conservative evangelical Protestantism is a significant part of the culture and Christian church attendance across the denominations is generally higher than the nation's average. By contrast, religion plays the least important role in New England and in the Western United States.[207]

As with other Western countries, the U.S. is becoming less religious. Irreligion is growing rapidly among Americans under 30.[212] Polls show that overall American confidence in organized religion is declining,[213] and that younger Americans in particular are becoming increasingly irreligious.[214]

Family structureEdit

Main article: Family structure in the United States

In 2007, 58% of Americans age 18 and over were married, 6% were widowed, 10% were divorced, and 25% had never been married.[215]Women now work mostly outside the home and receive a majority of bachelor's degrees.[216]

The U.S. teenage pregnancy rate, 79.8 per 1,000 women, is the highest among OECD nations.[217] Between 2007 and 2010, the highest teenage birth rate was in Mississippi, and the lowest in New Hampshire.[218] Abortion is legal throughout the U.S., owing toRoe v. Wade, a 1973 landmark decision by the United States Supreme Court. While the abortion rate is falling, the abortion ratio of 241 per 1,000 live births and abortion rate of 15 per 1,000 women aged 15–44 remain higher than those of most Western nations.[219] In 2011, the average age at first birth was 25.6 and 40.7% of births were to unmarried women.[220] The total fertility rate (TFR) was estimated for 2013 at 2.06 births per woman.[221]

Adoption in the United States is common and relatively easy from a legal point of view (compared to other Western countries).[222] In 2001, with over 127,000 adoptions, the U.S. accounted for nearly half of the total number of adoptions worldwide.[223]

Same-sex marriage is legally recognized in 14 U.S. states and the District of Columbia.[224]

Government and politicsEdit

Main articles: Federal government of the United Statesstate governments of the United States, and elections in the United States[38]U.S. Capitol seats the Congress:
the Senate, left; the House, right[39]The White House used by the U.S. President[40]Supreme Court and offices for nineJustices[41][42]Political system of the United States

The United States is the world's oldest survivingfederation. It is a constitutional republic andrepresentative democracy, "in which majority rule is tempered by minority rights protected by law".[225]The government is regulated by a system of checks and balances defined by the U.S. Constitution, which serves as the country's supreme legal document.[226]For 2012, the US ranked 21st on the Democracy Index[227] and 19th on the Corruption Perceptions Index.[228]

In the American federalist system, citizens are usually subject tothree levels of government: federal, state, and local. The local government's duties are commonly split between county andmunicipal governments. In almost all cases, executive and legislative officials are elected by a plurality vote of citizens by district. There is no proportional representation at the federal level, and it is very rare at lower levels.

The federal government is composed of three branches:

The House of Representatives has 435 voting members, each representing a congressional district for a two-year term. House seats areapportioned among the states by population every tenth year. At the 2010 census, seven states had the minimum of one representative, while California, the most populous state, had 53.[232]

The Senate has 100 members with each state having two senators, elected at-large to six-year terms; one third of Senate seats are up for election every other year. The president serves a four-year term and may be elected to the office no more than twice. The president is not elected by direct vote, but by an indirect electoral college system in which the determining votes are apportioned to the states and the District of Columbia.[233] The Supreme Court, led by the Chief Justice of the United States, has nine members, who serve for life.[234]

The state governments are structured in roughly similar fashion; Nebraska uniquely has a unicameral legislature.[235] The governor(chief executive) of each state is directly elected. Some state judges and cabinet officers are appointed by the governors of the respective states, while others are elected by popular vote.

The original text of the Constitution establishes the structure and responsibilities of the federal government and its relationship with the individual states. Article One protects the right to the "great writ" of habeas corpus, The Constitution has been amended 27 times;[236]the first 10 amendments, which make up the Bill of Rights, and the Fourteenth Amendment form the central basis of Americans' individual rights. All laws and governmental procedures are subject to judicial review and any law ruled by the courts to be in violation of the Constitution is voided. The principle of judicial review, not explicitly mentioned in the Constitution, was established by the Supreme Court in Marbury v. Madison (1803)[237] in a decision handed down by Chief Justice John Marshall.[238]

Political divisionsEdit

Main articles: Political divisions of the United StatesU.S. stateTerritories of the United States, and List of states and territories of the United StatesFurther information: Territorial evolution of the United States and United States territorial acquisitions

The United States is a federal union of 50 states. The original 13 states were the successors of the 13 colonies that rebelled against British rule. Early in the country's history, three new states were organized on territory separated from the claims of the existing states:Kentucky from VirginiaTennessee from North Carolina; and Maine from Massachusetts. Most of the other states have been carved from territories obtained through war or purchase by the U.S. government. One set of exceptions includes VermontTexas, and Hawaii: each was an independent republic before joining the union. During the American Civil WarWest Virginia broke away from Virginia. The most recent state—Hawaii—achieved statehood on August 21, 1959.[239] The states do not have the right to unilaterally secede from the union.

The states compose the vast bulk of the U.S. land mass; the two other areas considered integral parts of the country are the District of Columbia, the federal district where the capital, Washington, is located; and Palmyra Atoll, an uninhabited but incorporated territory in the Pacific Ocean. The United States also possesses five major overseas territories: Puerto Rico and the United States Virgin Islandsin the Caribbean; and American SamoaGuam, and the Northern Mariana Islands in the Pacific.[240] Those born in the major territories are birthright U.S. citizens except Samoans. Samoans born in American Samoa are born U.S. nationals, and may become naturalized citizens.[241] American citizens residing in the territories have fundamental constitutional protections and elective self-government, with a territorial Member of Congress, but they do not vote for president as states. Territories have personal and business tax regimes different from that of states.[242]

The United States also observes tribal sovereignty of the Native Nations. Though reservations are within state borders, the reservation is a sovereign. While the United States recognizes this sovereignty, other countries may not.[243]

[43]===Parties and elections===

Main articles: Politics of the United States and Political ideologies in the United States[44][45](from left to right) House Majority LeaderEric Cantor, House Minority Leader Nancy PelosiHouse Speaker John Boehner,President Barack ObamaSenate Majority Leader Harry Reid, Senate Minority LeaderMitch McConnell at the White House in 2011

The United States has operated under a two-party system for most of its history.[244] For elective offices at most levels, state-administered primary elections choose the major partynominees for subsequent general elections. Since the general election of 1856, the major parties have been the Democratic Partyfounded in 1824, and the Republican Partyfounded in 1854. Since the Civil War, only one third-party presidential candidate—former presidentTheodore Roosevelt, running as a Progressive in 1912—has won as much as 20% of the popular vote. The third-largest political party is the Libertarian Party.

Within American political culture, the Republican Party is considered center-right orconservative and the Democratic Party is considered center-left or liberal.[245] The states of the Northeast and West Coast and some of the Great Lakes states, known as "blue states", are relatively liberal. The "red states" of the South and parts of the Great Plains and Rocky Mountains are relatively conservative.

The winner of the 2008 presidential election and the 2012 presidential election, DemocratBarack Obama, is the 44th U.S. president.

In the 113th United States Congress, the House of Representatives is controlled by the Republican Party, while the Democratic Party has control of the Senate. The Senate currently consists of 52 Democrats, two independents who caucus with the Democrats, and 46 Republicans; the House consists of 234 Republicans and 201 Democrats.[246] There are 30 Republican and 20 Democratic state governors.[247]

Since the founding of the United States until 2000s, the country's governance has been primarily dominated by White Anglo-Saxon Protestants (WASPs). However, the situation has changed recently and of the top 17 positions (four national candidates of the two major party in the 2012 U.S. presidential election, four leaders in 112th United States Congress, and nine Supreme Court Justices) there is only one WASP.[248][249][250]

Foreign relationsEdit

Main articles: Foreign relations of the United States and Foreign policy of the United StatesSee also: Covert United States foreign regime change actions[46][47]The British Foreign Secretary, William Hague, and the U.S. Secretary of State,John Kerry, June 2013

The United States has established foreign relations. It is a permanent member of the United Nations Security Council, and New York City hosts the United Nations Headquarters. It is a member of the G8,[251] G20, and Organisation for Economic Co-operation and Development. Almost all countries have embassies in Washington, D.C., and many have consulatesaround the country. Likewise, nearly all nations host American diplomatic missions. However, CubaIranNorth KoreaBhutan, and the Republic of China (Taiwan) do not have formal diplomatic relations with the United States (although the U.S. still supplies Taiwan with military equipment).

The United States has a "special relationship" with the United Kingdom[252] and strong ties with Canada,[253] Australia,[254] New Zealand,[255] the Philippines,[256] Japan,[257] South Korea,[258] Israel,[259] and several European countries such as France and Germany. It works closely with fellow NATO members on military and security issues and with its neighbors through the Organization of American States and free trade agreements such as the trilateral North American Free Trade Agreement with Canada and Mexico. In 2008, the United States spent a net $25.4 billion on official development assistance, the most in the world. As a share of America's large gross national income (GNI), however, the U.S. contribution of 0.18% ranked last among 22 donor states. By contrast, private overseas giving by Americans is relatively generous.[260]

The U.S. exercises full international defense authority and responsibility for three sovereign nations through Compact of Free Association with Micronesia, the Marshall Islands and Palau, all of which are Pacific island nations which were part of the U.S.-administered Trust Territory of the Pacific Islands beginning after World War II, and gained independence in subsequent years.

Government financeEdit

[48][49]ITEP estimate of the total effective tax rate for federal, state and local taxes (personal and corporate income, payroll, property, sales, excise, estate, etc.) by income level in 2011.[261]See also: Taxation in the United States and United States federal budget

Taxes are levied in the United States at the federal, state and local government level. These include taxes on income, payroll, property, sales, imports, estates and gifts, as well as various fees. In 2010 taxes collected by federal, state and municipal governments amounted to 24.8% of GDP.[262] During FY2012, the federal government collected approximately $2.45 trillion in tax revenue, up $147 billion or 6% versus FY2011 revenues of $2.30 trillion. Primary receipt categories included individual income taxes ($1,132B or 47%), Social Security/Social Insurance taxes ($845B or 35%), and corporate taxes ($242B or 10%).[263]

U.S. taxation is generally progressive, especially the federal income taxes,[264][265][266][267][268][269] but the incidence of corporate income tax has been a matter of considerable ongoing controversy for decades.[270][271][272][273] In 2009 the top 10% of earners, with 36% of the nation's income, paid 78.2% of the federal personal income tax burden, while the bottom 40% had a negative liability.[268] However, payroll taxes for Social Security are a flat regressive tax, with no tax charged on income above $113,700 and no tax at all paid on unearned income from things such as stocks and capital gains.[274][275] The historic reasoning for the regressive nature of the payroll tax is that entitlement programs have not been viewed as welfare transfers.[276][277] The top 10% paid 51.8% of total federal taxes in 2009, and the top 1%, with 13.4% of pre-tax national income, paid 22.3% of federal taxes.[268] In 2013 the Tax Policy Center projected total federal effective tax rates of 35.5% for the top 1%, 27.2% for the top quintile, 13.8% for the middle quintile, and −2.7% for the bottom quintile.[278][279] State and local taxes vary widely, but are generally less progressive than federal taxes as they rely heavily on broadly borne regressive sales and property taxes that yield less volatile revenue streams, though their consideration does not eliminate the progressive nature of overall taxation.[266][280]

During FY 2012, the federal government spent $3.54 trillion on a budget or cash basis, down $60 billion or 1.7% vs. FY 2011 spending of $3.60 trillion. Major categories of FY 2012 spending included: Medicare & Medicaid ($802B or 23% of spending), Social Security ($768B or 22%), Defense Department ($670B or 19%), non-defense discretionary ($615B or 17%), other mandatory ($461B or 13%) and interest ($223B or 6%).[263]

Public debtEdit

[50][51]US federal debt held by the public as a percentage of GDP, from 1790 to 2013Main article: National debt of the United States

In March 2013, U.S. federal government debt held by the public was approximately $11.888 trillion, or about 75% of U.S. GDP. Intra-governmental holdings stood at $4.861 trillion, giving a combined total debt of $16.749 trillion.[281][282] By 2012, total federal debt had surpassed 100% of U.S. GDP.[283] The U.S. has a credit rating of AA+ from Standard & Poor's, AAA from Fitch, and Aaa from Moody's.[284]

Historically, the U.S. public debt as a share of GDP increased during wars and recessions, and subsequently declined. For example, debt held by the public as a share of GDP peaked just after World War II (113% of GDP in 1945), but then fell over the following 30 years. In recent decades, large budget deficits and the resulting increases in debt have led to concern about the long-term sustainability of the federal government's fiscal policies.[285] However, these concerns are not universally shared.[286]


Main article: United States Armed Forces

The president holds the title of commander-in-chief of the nation's armed forces and appoints its leaders, the Secretary of Defense and the Joint Chiefs of Staff. The United States Department of Defense administers the armed forces, including the ArmyNavyMarine Corps, and Air Force. The Coast Guard is run by the Department of Homeland Security in peacetime and the Department of the Navy in time of war. In 2008, the armed forces had 1.4 million personnel on active duty. The Reserves and National Guard brought the total number of troops to 2.3 million. The Department of Defense also employed about 700,000 civilians, not including contractors.[287]

[52][53]The carrier strike groups of the Kitty HawkRonald Reagan, and Abraham Lincoln with aircraft from the Marine Corps,Navy, and Air Force.

Military service is voluntary, though conscription may occur in wartime through the Selective Service System.[288] American forces can be rapidly deployed by the Air Force's large fleet of transport aircraft, the Navy's 11 active aircraft carriers, and Marine Expeditionary Units at sea with the Navy's Atlantic and Pacific fleets. The military operates 865 bases and facilities abroad,[289] and maintains deployments greater than 100 active duty personnel in 25 foreign countries.[290] The extent of this global military presence has prompted some scholars to describe the United States as maintaining an "empire of bases".[291]

Total U.S. military spending in 2011, more than $700 billion, was 41% of global military spending and equal to the next 14 largest national military expenditures combined. At 4.7% of GDP, the rate was the second-highest among the top 15 military spenders, after Saudi Arabia.[292] U.S. defense spending as a percentage of GDP ranked 23rd globally in 2012 according to the CIA.[293] Defense's share of U.S. spending has generally declined in recent decades, from Cold War peaks of 14.2% of GDP in 1953 and 69.5% of federal outlays in 1954 to 4.7% of GDP and 18.8% of federal outlays in 2011.[294]

The proposed base Department of Defense budget for 2012, $553 billion, was a 4.2% increase over 2011; an additional $118 billion was proposed for the military campaigns in Iraq and Afghanistan.[295] The last American troops serving in Iraq departed in December 2011;[296] 4,484 servicemen were killed during the Iraq War.[297] Approximately 90,000 U.S. troops were serving in Afghanistan in April 2012;[298] by November 8th 2013 2,285 had been killed during the War in Afghanistan.[299]

Crime and law enforcementEdit

Main articles: Law enforcement in the United States and Crime in the United StatesSee also: Law of the United StatesIncarceration in the United StatesCapital punishment in the United States, and Second Amendment to the United States Constitution[54][55]Law enforcement in the U.S. is maintained primarily by local police departments. The New York City Police Department (NYPD) is the largest in the country.[300]

Law enforcement in the United States is primarily the responsibility of local police andsheriff's departments, with state police providing broader services. Federal agencies such as the Federal Bureau of Investigation (FBI) and the U.S. Marshals Service have specialized duties.[301] At the federal level and in almost every state, jurisprudence operates on acommon law system. State courts conduct most criminal trials; federal courts handle certain designated crimes as well as certain appeals from the state criminal courts. Plea bargaining in the United States is very common; the vast majority of criminal cases in the country are settled by plea bargain rather than jury trial.[302][303] Federal law prohibits a variety of drugs, although states sometimes pass laws in conflict with federal regulations.[citation needed]

In 2012 there were 4.7 murders per 100,000 persons in the United States, a 54% decline from the modern peak of 10.2 in 1980.[304][305][306] Among developed nations, the United States has above-average levels of violent crime and particularly high levels of gun violenceand homicide.[307] A cross-sectional analysis of the World Health Organization Mortality Database from 2003 showed that United States "homicide rates were 6.9 times higher than rates in the other high-income countries, driven by firearm homicide rates that were 19.5 times higher."[308] Gun ownership rights continue to be the subject of contentious political debate.

Capital punishment is sanctioned in the United States for certain federal and military crimes, and used in 32 states.[309] While there are 32 states which include capital punishment within their sentencing statutes, some states (such as New Hampshire and Kansas) have yet to execute anyone since 1976, as demonstrated by the lack of any executions by these states out of the 1,317 total executions which had taken place by December 5, 2012.[310] No executions took place from 1967 to 1977, owing in part to a U.S. Supreme Court ruling striking down arbitrary imposition of the death penalty. In 1976, that Court ruled that, under appropriate circumstances, capital punishment may constitutionally be imposed; since the decision there have been more than 1,300 executions, a majority of these taking place in three states: Texas, Virginia, and Oklahoma.[311] Five state legislatures in the modern era have abolished the death penalty, though two of those laws (in New Mexico and Connecticut) were not retroactive. Additionally, state courts in Massachusetts and New York struck down death penalty statutes and their legislatures took no action in response. In 2010, the country had the fifth highest number of executions in the world, following China, IranNorth Korea, and Yemen.[312]

The United States has the highest documented incarceration rate and total prison population in the world.[313][314] At the start of 2008, more than 2.3 million people were incarcerated, more than one in every 100 adults.[315] The prison population has quadrupled since 1980,[316] and is over three times the figure in Poland, the Organisation for Economic Co-operation and Development (OECD) country with the next highest rate.[317] African-American males are jailed at about six times the rate of white males and three times the rate of Hispanic males.[318] The country's high rate of incarceration is largely due to changes in sentencing guidelines and drug policies.[319] In 2008, Louisiana had the highest incarceration rate, and Maine the lowest.[320] Despite Louisana having the highest number of its citizens imprisoned, the FBI's crime report for 2012 listed the state as having the highest rate of murders and nonnegligent manslaughters in the United States.[321]


Main article: Economy of the United States

Economic indicators
Nominal GDP 15.984 trillion (Q1 2013) [322]
Real GDP growth 1.7% (Q2 2013, annualized)
2.2% (2012) [323]
CPI inflation 2.0% (February 2012 – February 2013) [324]
Employment-to-population ratio 58.5% (March 2013) [325]
Unemployment 7.4% (July 2013) [326]
Labor force participation rate 63.3% (March 2013) [327]
Poverty 15.1% (2010) [328]
Public debt $16.433 trillion (Q4 2012) [329]
Household net worth $58.5 trillion (Q4 2011) [330]

The United States has a capitalist mixed economy, which is fueled by abundant natural resources, a well-developed infrastructure, and high productivity.[331] According to the International Monetary Fund, the U.S. GDP of $15.1 trillion constitutes 22% of the gross world product at market exchange rates and over 19% of the gross world product at purchasing power parity (PPP).[6] Though larger than any other nation's, its national GDP was about 5% smaller at PPP in 2011 than the European Union's, whose population is around 62% higher.[332] The country ranks ninth in the world innominal GDP per capita and sixth in GDP per capita at PPP.[6] The U.S. dollar is the world's primary reserve currency.[333]

The United States is the largest importer of goods and second largest exporter, though exports per capita are relatively low. In 2010, the total U.S. trade deficit was $635 billion.[334] Canada, China, Mexico, Japan, and Germany are its top trading partners.[335] In 2010, oil was the largest import commodity, while transportation equipment was the country's largest export.[334] China is the largest foreign holder of U.S. public debt.[336]

[56][57]The New York Stock Exchange on Wall Street, the world's largest stock exchange per total market capitalization of its listed companies.[337]

In 2009, the private sector was estimated to constitute 86.4% of the economy, with federal government activity accounting for 4.3% and state and local government activity (including federal transfers) the remaining 9.3%.[338] While its economy has reached apostindustrial level of development and its service sector constitutes 67.8% of GDP, the United States remains an industrial power.[339] The leading business field by gross business receipts is wholesale and retail trade; by net income it is manufacturing.[340]

Chemical products are the leading manufacturing field.[341] The United States is the third largest producer of oil in the world, as well as its largest importer.[342] It is the world's number one producer of electrical and nuclear energy, as well as liquid natural gas, sulfur, phosphates, and salt. While agriculture accounts for just under 1% of GDP,[339] the United States is the world's top producer of corn[343] and soybeans.[344] The National Agricultural Statistics Service maintains agricultural statistics for products that include;peanutsOatsRyeWheatRiceCottoncornbarleyhaysunflowers, and oilseeds. In addition, the United States Department of Agriculture (USDA) provides livestock statistics regarding beefpoultrypork, along with dairy products. The National Mining Association provides data pertaining to coal and minerals that include; berylliumcopperleadmagnesiumzinctitanium and others.[345][346] In the franchising business model, McDonald's and Subway are the two most recognized brands in the world. Coca-Cola is the most recognized soft drink company in the world.[347]

Consumer spending comprises 71% of the U.S. economy in 2013.[348] In August 2010, the American labor force consisted of 154.1 million people. With 21.2 million people, government is the leading field of employment. The largest private employment sector is health care and social assistance, with 16.4 million people. About 12% of workers are unionized, compared to 30% in Western Europe.[349]The World Bank ranks the United States first in the ease of hiring and firing workers.[350] The United States is the only advanced economy that that does not guarantee its workers paid vacation[351] and is one of just a few countries in the world without paid family leave as a legal right, with the others being Papua New GuineaSuriname and Liberia.[352] In 2009, the United States had the third highest labor productivity per person in the world, behind Luxembourg and Norway. It was fourth in productivity per hour, behind those two countries and the Netherlands.[353]

The 2008-2012 global recession had a significant impact on the United States. For example, persistent high unemployment remains, along with low consumer confidence, the continuing decline in home values and increase in foreclosures and personal bankruptcies, an escalating federal debt crisisinflation, and rising petroleum and food prices. In fact, a 2011 poll found that more than half of all Americans think the U.S. is still in recession or even depression, despite official data that shows a historically modest recovery.[354]

Income, poverty, and wealthEdit

Main articles: Income in the United StatesPoverty in the United States, and Wealth in the United StatesSee also: Income inequality in the United States and Affluence in the United States

Americans have the highest average household and employee income among OECD nations, and in 2007 had the second highestmedian household income.[22][355] According to the Census Bureau real median household income was $50,502 in 2011, down from $51,144 in 2010.[356] The Global Food Security Index ranked the U.S. number one for food affordability and overall food security in March 2013.[357] Americans on average have over twice as much living space per dwelling and per person as European Union residents, and more than every EU nation.[358]

[58][59]Changes in real US incomes for the top 1%, middle 60%, and bottom 20% from 1979 through 2007.[359]

The U.S. economy is currently embroiled in the economic downturn which followed thefinancial crisis of 2007–2008, with output still below potential according to the CBO[360] and unemployment still above historic trends.[361] From 1983 to 2008, U.S. real compounded annual GDP growth was 3.3%, compared to a 2.3% weighted average for the rest of theG7.[362] In 2013 the United Nations Development Programme ranked the United States 16th among 132 countries on its inequality-adjusted human development index (IHDI), 13 places lower than in the standard HDI.[363] Four out of five U.S. adults struggle with joblessness, near-poverty or reliance on welfare for at least parts of their lives.[364]

In February 2013, the unemployment rate was 7.7%, or 12.0 million people, while the government's broader U-6 unemployment rate, which includes the part-time underemployed, was 14.3%, or 22.2 million. With a record proportion of long-term unemployed, continued decreasing household income, tax rises, and new federal budget cuts, the U.S. economy remained in a jobless recovery.[365][366] Nearly half of U.S. households are considered "low-income" by the U.S. census (earning $45,000 or less per year for a family of four).[367] The rise in the share of total annual income received by the top 1 percent, which has more than doubled from 9 percent in 1976 to 20 percent in 2011, has had a significant impact on income inequality,[368] leaving the United States with one of the widest income distributions among OECD nations.[369][370] The post-recession income gains have been very uneven, with the top 1 percent capturing 95 percent of the income gains from 2009 to 2012.[371]

[60][61]Productivity and Real Median Family Income Growth 1947–2009.

There has been a widening gap between productivity and median incomes since the 1970s.[372] While inflation-adjusted ("real") household income had been increasing almost every year from 1947 to 1999, it has since been flat and even decreased recently.[373] Poverty in the U.S. has been increasing as median incomes have declined, having now fallen for five consecutive years.[374] There were about 643,000 sheltered and unsheltered homeless persons in the U.S. in January 2009. Almost two-thirds stayed in an emergency shelter or transitional housing program and the other third were living on the street, in an abandoned building, or another place not meant for human habitation. In 2011 16.7 million children lived in food-insecure households, about 35% more than 2007 levels, though only 1.1% of U.S. children, or 845,000, saw reduced food intake or disrupted eating patterns at some point during the year, and most cases weren't chronic.[375]

Wealth, like income and taxes, is highly concentrated: The richest 10% of the adult population possesses 69.8% of the country's household wealth, the second-highest share among developed nations.[376] Between June 2007 and November 2008 the global recession led to falling asset prices around the world. Assets owned by Americans lost about a quarter of their value.[377] Since peaking in the second quarter of 2007, household wealth is down $14 trillion.[378] At the end of 2008, household debt amounted to $13.8 trillion.[379] In 2010, the median household retirement account balance for workers aged 55 to 64 was $120,000, and about a third of households had no retirement savings at all.[380] 75% of Americans nearing retirement age have less than $30,000 in their retirement accounts.[381]



Main article: Transportation in the United States[62][63]The Interstate Highway System, which extends 46,876 miles (75,440 km)[382]

Personal transportation is dominated by automobiles, which operate on a network of 13 million roads, including one of the world's longest highway systems.[383] The world's second largest automobile market,[384] the United States has the highest rate of per-capita vehicle ownership in the world, with 765 vehicles per 1,000 Americans.[385]About 40% of personal vehicles are vans, SUVs, or light trucks.[386] The average American adult (accounting for all drivers and non-drivers) spends 55 minutes driving every day, traveling 29 miles (47 km).[387]

Mass transit accounts for 9% of total U.S. work trips.[388][389] While transport of goods by rail is extensive, relatively few people use rail to travel,[390] though ridership onAmtrak, the national intercity passenger rail system, grew by almost 37% between 2000 and 2010.[391] Also, light rail development has increased in recent years.[392]Bicycle usage for work commutes is minimal.[393]

The civil airline industry is entirely privately owned and has been largely deregulated since 1978, while most major airports are publicly owned. The three largest airlines in the world by passengers carried are U.S.-based; American Airlines is number one after its 2013 acquisition of US Airways.[394] Of the world's 30 busiest passenger airports, 16 are in the United States, including the busiest,Hartsfield-Jackson Atlanta International Airport.[395]

Further information: List of airlines of the United States===Energy===

See also: Energy policy of the United States

The United States energy market is 29,000 terawatt hours per year. Energy consumption per capita is 7.8 tons of oil equivalent per year, the 10th highest rate in the world. In 2005, 40% of this energy came from petroleum, 23% from coal, and 22% from natural gas. The remainder was supplied by nuclear power and renewable energy sources.[396] The United States is the world's largest consumer of petroleum.[397]

For decades, nuclear power has played a limited role relative to many other developed countries, in part because of public perception in the wake of a 1979 accident. In 2007, several applications for new nuclear plants were filed.[398] The United States has 27% of global coal reserves.[399] It is the world's largest producer of natural gas and crude oil.[400]

Science and technologyEdit

Main article: Science and technology in the United StatesSee also: Technological and industrial history of the United States[64][65]Neil Armstrong was the first person to walk on the Moon.

The United States has been a leader in scientific research and technological innovation since the late 19th century. In 1876, Alexander Graham Bell was awarded the first U.S. patent for the telephone.Thomas Edison's laboratory developed the phonograph, the first long-lasting light bulb, and the first viablemovie camera.[401] In the early 20th century, the automobile companies of Ransom E. Olds and Henry Ford popularized the assembly line. The Wright brothers, in 1903, made the first sustained and controlled heavier-than-air powered flight.[402]

The rise of Nazism in the 1930s led many European scientists, including Albert EinsteinEnrico Fermi, and John von Neumann, to immigrate to the United States. During World War II, the Manhattan Projectdeveloped nuclear weapons, ushering in the Atomic Age. The Space Race produced rapid advances in rocketry, materials science, and computers. Advancements by American microprocessor companies such as Advanced Micro Devices (AMD), and Intel along with both computer software and hardwarecompanies that include; Sun MicrosystemsIBMGNU-LinuxApple Computer, and Microsoft refined and popularized the personal computer.

The United States government largely developed the Defense Department's ARPANET and its successor, the Internet. Today, 64% of research and development funding comes from the private sector.[403] The United States leads the world in scientific research papers and impact factor.[404] As of April 2010, 77% of American households owned at least one computer, and 68% had broadband Internet service.[405] 85% of Americans also own a mobile phone as of 2011.[406] The country is the primary developer and grower of genetically modified food, representing half of the world's biotech crops.[407]


Main article: Education in the United StatesSee also: Educational attainment in the United States and Higher education in the United States[66][67]Some 80% of U.S. college students attendpublic universities such as the University of Virginia, founded by Thomas Jefferson[408]

American public education is operated by state and local governments, regulated by the United States Department of Education through restrictions on federal grants. In most states, children are required to attend school from the age of six or seven (generally, kindergarten or first grade) until they turn 18 (generally bringing them through twelfth grade, the end of high school); some states allow students to leave school at 16 or 17.[409] About 12% of children are enrolled in parochial or nonsectarianprivate schools. Just over 2% of children are homeschooled.[410] The US spends more on education per student than any nation in the world.[411]

The United States has many competitive private and public institutions of higher education. According to prominent international rankings, 13 or 15 American colleges and universities are ranked among the top 20 in the world.[412][413] There are also localcommunity colleges with generally more open admission policies, shorter academic programs, and lower tuition. Of Americans 25 and older, 84.6% graduated from high school, 52.6% attended some college, 27.2% earned a bachelor's degree, and 9.6% earned graduate degrees.[414] The basic literacy rate is approximately 99%.[4][415] The United Nations assigns the United States an Education Index of 0.97, tying it for 12th in the world.[416]

As for public expenditures on higher education, the U.S. trails some other OECD nations but spends more per student than the OECD average, and more than all nations in combined public and private spending.[411][417] As of 2012, student loan debt exceeded one trillion dollars, more than Americans owe on credit cards.[418]


See also: Health care in the United StatesHealth care reform in the United States, and Health insurance in the United States[68][69]The Texas Medical Center in Houston is the world's largest medical center.

The United States has life expectancy of 78.4 years at birth, up from 75.2 years in 1990, ranks it 50th among 221 nations, and 27th out of the 34 industrialized OECDcountries, down from 20th in 1990.[419][420] Increasing obesity in the United States and health improvements elsewhere have contributed to lowering the country's rank in life expectancy from 1987, when it was 11th in the world.[421] Obesity rates in the United States are among the highest in the world.[422] Approximately one-third of the adult population is obese and an additional third is overweight;[423] the obesity rate, the highest in the industrialized world, has more than doubled in the last quarter-century.[424] Obesity-related type 2 diabetes is considered epidemic by health care professionals.[425] The infant mortality rate of 6.06 per thousand places the United States 176th highest out of 222 countries.[426]

In 2010, coronary artery diseaselung cancerstrokechronic obstructive pulmonary diseases, and traffic accidents caused the most years of life lost in the U.S. Low back pain, depressionmusculoskeletal disorders, neck pain, and anxiety caused the most years lost to disability. The most deleterious risk factors were poor diet, tobacco smoking, obesity, high blood pressurehigh blood sugar, physical inactivity, and alcohol use. Alzheimer's disease, drug abuse, kidney disease and cancer, and falls caused the most additional years of life lost over their age-adjusted 1990 per-capita rates.[420] U.S. teenage pregnancy and abortion rates are substantially higher than in other Western nations.

The U.S. is a global leader in medical innovation. America solely developed or contributed significantly to 9 of the top 10 most important medical innovations since 1975 as ranked by a 2001 poll of physicians, while the EU and Switzerland together contributed to five. Since 1966, Americans have received more Nobel Prizes in Medicine than the rest of the world combined. From 1989 to 2002, four times more money was invested in private biotechnology companies in America than in Europe.[427][428] The U.S. health-care system far outspendsany other nation, measured in both per capita spending and percentage of GDP.[429] Health-care coverage in the United States is a combination of public and private efforts and is not universal. In 2010, 49.9 million residents or 16.3% of the population did not carryhealth insurance. The subject of uninsured and underinsured Americans is a major political issue.[430][431] In 2006, Massachusettsbecame the first state to mandate universal health insurance.[432] Federal legislation passed in early 2010 would ostensibly create a near-universal health insurance system around the country by 2014, though the bill and its ultimate impact are issues of controversy.[433][434]


Main article: Culture of the United StatesSee also: Social class in the United StatesPublic holidays in the United States, and Tourism in the United States[70][71]The Statue of Liberty in New York City is a symbol of both the U.S. and ideals of freedom, democracy, and opportunity.[435]

The United States is home to many cultures and a wide variety of ethnic groups, traditions, and values.[12][436] Aside from the relatively small Native American and Native Hawaiianpopulations, nearly all Americans or their ancestors settled or immigrated within the past five centuries.[437] Mainstream American culture is a Western culture largely derived from thetraditions of European immigrants with influences from many other sources, such astraditions brought by slaves from Africa.[12][438] More recent immigration from Asia and especially Latin America has added to a cultural mix that has been described as both a homogenizing melting pot, and a heterogeneous salad bowl in which immigrants and their descendants retain distinctive cultural characteristics.[12]

Core American culture was established by Protestant British colonists and shaped by thefrontier settlement process, with the traits derived passed down to descendants and transmitted to immigrants through assimilation. Americans have traditionally been characterized by a strong work ethic, competitiveness, and individualism, as well as a unifying belief in an "American Creed" emphasizing liberty, equality, private property, democracy, rule of law, and a preference for limited government.[439] Americans are extremely charitable by global standards. According to a 2006 British study, Americans gave 1.67% of GDP to charity, more than any other nation studied, more than twice the second place British figure of 0.73%, and around twelve times the French figure of 0.14%.[440][441]

American culture is considered the most individualistic in the world.[442] The American Dream, or the perception that Americans enjoy high social mobility, plays a key role in attracting immigrants.[443] Social mobility is actually lower than other high-income countries, with the OECD ranking the U.S. 10th behind France, Germany, Canada, Australia, and the Nordic countries,[443][444][445][446] This has been partly attributed to the depth of American poverty, which leaves poor children starting especially far behind.[447] Such studies are based on relative comparisons within each nation rather than absolute wealth earned throughout one's life, the U.S. having both a more stretched-out income distribution and a higher median income than those nations.[448] While the mainstream culture holds that the United States is a classless society,[449] scholars identify significant differences between the country's social classes, affectingsocialization, language, and values.[450]

Americans' self-images, social viewpoints, and cultural expectations are associated with their occupations to an unusually close degree.[451] While Americans tend greatly to value socioeconomic achievement, being ordinary or average is generally seen as a positive attribute.[452]

Popular mediaEdit

Main articles: Media of the United StatesCinema of the United StatesTelevision in the United States, and Music of the United States[72][73]The Hollywood Sign in Los Angeles, California, a symbol of the American film industry

[clarification needed]

The world's first commercial motion picture exhibition was given in New York City in 1894, using Thomas Edison's Kinetoscope. The next year saw the first commercial screening of a projected film, also in New York, and the United States was in the forefront of sound film's development in the following decades. Since the early 20th century, the U.S. film industry has largely been based in and around Hollywood, California.[citation needed]

Director D. W. Griffith was central to the development of film grammar and Orson Welles'sCitizen Kane (1941) is frequently cited as the greatest film of all time.[453][454] American screen actors like John Wayne and Marilyn Monroe have become iconic figures, while producer/entrepreneur Walt Disney was a leader in both animated film and moviemerchandising. Hollywood is also one of the leaders in motion picture production.[455]

In 1938, Superman, the quintessential comic book superhero of DC Comics, developed into an American icon.[456] Additional comic book publishers include; Marvel Comics, created in 1939, Image Comics, created in 1992, Dark Horse Comics, created in 1986, and numerous small press comic book companies. In celebration of the industry's success, annual comic conventions take place at The San Diego Comic-Con International, which has an attendance of over 130,000 visitors.

Americans are the heaviest television viewers in the world,[457] and the average viewing time continues to rise, reaching five hours a day in 2006.[458] The four major broadcast television networks are all commercial entities. Americans listen to radio programming, also largely commercial, on average just over two-and-a-half hours a day.[459] Aside from web portals and search engines, the most popular websites are FacebookYouTubeWikipediaBloggereBay, and Craigslist.[460][clarification needed] The rhythmic and lyrical styles ofAfrican-American music have deeply influenced American music at large, distinguishing it from European traditions. Elements from folkidioms such as the blues and what is now known as old-time music were adopted and transformed into popular genres with global audiences. Jazz was developed by innovators such as Louis Armstrong and Duke Ellington early in the 20th century. Country musicdeveloped in the 1920s, and rhythm and blues in the 1940s.[461][clarification needed] Elvis Presley and Chuck Berry were among the mid-1950s pioneers of rock and roll. In the 1960s, Bob Dylan emerged from the folk revival to become one of America's most celebrated songwriters and James Brown led the development of funk. More recent American creations include hip hop and house music. American pop stars such as Presley, Michael Jackson, and Madonna have become global celebrities.[461]

Literature, philosophy, and the artsEdit

Main articles: American literatureAmerican philosophyVisual art of the United States, and American classical music

In the 18th and early 19th centuries, American art and literature took most of its cues from Europe. Writers such as Nathaniel HawthorneEdgar Allan Poe, and Henry David Thoreau established a distinctive American literary voice by the middle of the 19th century. Mark Twain and poet Walt Whitman were major figures in the century's second half; Emily Dickinson, virtually unknown during her lifetime, is now recognized as an essential American poet.[462] A work seen as capturing fundamental aspects of the national experience and character—such as Herman Melville's Moby-Dick (1851), Twain's The Adventures of Huckleberry Finn (1885), and F. Scott Fitzgerald's The Great Gatsby (1925)—may be dubbed the "Great American Novel".[463]

[74][75]Mark Twain, famous American author andhumorist.

Eleven U.S. citizens have won the Nobel Prize in Literature, most recently Toni Morrison in 1993.William Faulkner and Ernest Hemingway are often named among the most influential writers of the 20th century.[464] Popular literary genres such as the Western and hardboiled crime fiction developed in the United States. The Beat Generation writers opened up new literary approaches, as have postmodernistauthors such as John BarthThomas Pynchon, and Don DeLillo.

The transcendentalists, led by Thoreau and Ralph Waldo Emerson, established the first major American philosophical movement. After the Civil War, Charles Sanders Peirce and then William James and John Dewey were leaders in the development of pragmatism. In the 20th century, the work of W. V. O. Quineand Richard Rorty, and later Noam Chomsky, brought analytic philosophy to the fore of American philosophical academia. John Rawls and Robert Nozick led a revival of political philosophyCornel Westand Judith Butler have led a continental tradition in American philosophical academia. Globally influentialChicago school economists like Milton FriedmanJames M. Buchanan, and Thomas Sowell have transcended discipline to impact various fields in social and political philosophy.[465][466]

In the visual arts, the Hudson River School was a mid-19th-century movement in the tradition of European naturalism. The realist paintings of Thomas Eakins are now widely celebrated. The 1913Armory Show in New York City, an exhibition of European modernist art, shocked the public and transformed the U.S. art scene.[467] Georgia O'KeeffeMarsden Hartley, and others experimented with new, individualistic styles. Major artistic movements such as the abstract expressionism of Jackson Pollock and Willem de Kooningand the pop art of Andy Warhol and Roy Lichtenstein developed largely in the United States. The tide of modernism and thenpostmodernism has brought fame to American architects such as Frank Lloyd WrightPhilip Johnson, and Frank Gehry.

[76][77]Times Square in New York City, the hub of the Broadway Theater District.

One of the first major promoters of American theater was impresario P. T. Barnum, who began operating a lower Manhattan entertainment complex in 1841. The team of Harrigan and Hart produced a series of popular musical comedies in New York starting in the late 1870s. In the 20th century, the modern musical form emerged on Broadway; the songs of musical theater composers such as Irving BerlinCole Porter, and Stephen Sondheim have become pop standards. Playwright Eugene O'Neill won the Nobel literature prize in 1936; other acclaimed U.S. dramatists include multiple Pulitzer Prize winners Tennessee WilliamsEdward Albee, and August Wilson.

Though little known at the time, Charles Ives's work of the 1910s established him as the first major U.S. composer in the classical tradition, while experimentalists such as Henry Cowelland John Cage created a distinctive American approach to classical composition. Aaron Copland and George Gershwin developed a new synthesis of popular and classical music.Choreographers Isadora Duncan and Martha Graham helped create modern dance, while George Balanchine and Jerome Robbins were leaders in 20th-century ballet. Americans have long been important in the modern artistic medium of photography, with major photographers including Alfred StieglitzEdward Steichen, and Ansel Adams. The newspaper comic strip and the comic book are both U.S. innovations.


Main article: Cuisine of the United States[78][79]An apple pie, surrounded by some other icons of American culture.

Mainstream American cuisine is similar to that in other Western countries. Wheat is the primary cereal grain. Traditional American cuisine uses indigenous ingredients, such as turkey, venison, potatoes, sweet potatoes, corn, squash, and maple syrup, which were consumed by Native Americans and early European settlers.[citation needed]

Slow-cooked pork and beef barbecue, crab cakes, potato chips, and chocolate chip cookies are distinctively American foods. Soul food, developed by African slaves, is popular around the South and among many African Americans elsewhere. Syncretic cuisines such asLouisiana CreoleCajun, and Tex-Mex are regionally important. The confectionery industry in the United States includes The Hershey Company, the largest chocolate manufacturer in North America. In addition, Frito-Lay, a subsidiary of PepsiCo, is the largest globally distributed snack food company in the world. The United States has a vast Breakfast cerealindustry that includes brands such as Kellog's and General Mills.[citation needed]

Characteristic dishes such as apple pie, fried chicken, pizza, hamburgers, and hot dogs derive from the recipes of various immigrants. French fries, Mexican dishes such as burritos and tacos, and pasta dishes freely adapted from Italian sources are widely consumed.[468] Americans generally prefer coffee to tea. Marketing by U.S. industries is largely responsible for making orange juice and milk ubiquitous breakfast beverages.[469][470]

The American fast food industry, the world's largest, pioneered the drive-through format in the 1930s. Fast food consumption has sparked health concerns. During the 1980s and 1990s, Americans' caloric intake rose 24%;[468] frequent dining at fast food outlets is associated with what public health officials call the American "obesity epidemic".[471] Highly sweetened soft drinks are widely popular, and sugared beverages account for nine percent of American caloric intake.[472]


Main article: Sports in the United States[80][81]Swimmer Michael Phelpsis the most decorated Olympic athlete of all time.

The market for professional sports in the United States is roughly $69 billion, roughly 50% larger than that of all of Europe, the Middle East, and Africa combined.[473] Baseball has been regarded as thenational sport since the late 19th century, while American football is now by several measures the most popular spectator sport.[474] Basketball and ice hockey are the country's next two leading professional team sports. These four major sports, when played professionally, each occupy a season at different, but overlapping, times of the year. College football and basketball attract large audiences. Boxing andhorse racing were once the most watched individual sports,[475] but they have been eclipsed by golf andauto racing, particularly NASCAR. In the 21st century, televised mixed martial arts has also gained a strong following of regular viewers.[476][477] While soccer is much less popular in the United States than in many other nations, it is played widely at the youth and amateur levels; even so, the men's team has been to the past six World Cups and the women are #1 in the women's world rankingsTennis and many outdoor sports are popular as well.

While most major U.S. sports have evolved out of European practices, basketballvolleyball,skateboardingsnowboarding, and cheerleading are American inventions, which have become popular in other countries. Lacrosse and surfing arose from Native American and Native Hawaiian activities that predate Western contact. Eight Olympic Games have taken place in the United States. The United States has won 2,301 medals at the Summer Olympic Games, more than any other country,[478] and 253 in the Winter Olympic Games, the second most by 2006.[479]

See alsoEdit

[82] United States portal


  1. Jump up^ 36 U.S.C. § 302 National motto
  2. Jump up^ Simonson, 2010
  3. Jump up^ Dept. of Treasury, 2011
  4. Jump up to:a b c d "United States"The World Factbook. CIA. September 30, 2009. Retrieved January 5, 2010 (area given in square kilometers).
  5. Jump up to:a b "U.S. POPClock Projection". U.S. Census Bureau. (figure updated automatically).
  6. Jump up to:a b c d e f g h "World Economic Outlook Database: United States". International Monetary Fund. November 2013. Retrieved November 5, 2013.
  7. Jump up^ "Income, Poverty and Health Insurance Coverage in the United States: 2011"NewsroomUnited States Census Bureau. September 12, 2012. Retrieved January 23, 2013.
  8. Jump up^ "Human Development Report 2013". United Nations Development Programme. March 14, 2013. Retrieved March 14, 2013.
  9. Jump up to:a b Feder, Jody (January 25, 2007). "English as the Official Language of the United States: Legal Background and Analysis of Legislation in the 110th Congress". (Congressional Research Service). Retrieved June 19, 2007.
  10. Jump up^ The New York Times Guide to Essential Knowledge, Second Edition: A Desk Reference for the Curious Mind. St. Martin's Press. 2007. p. 632. ISBN 978-0-312-37659-8.
  11. Jump up^ Onuf, Peter S. (1983). The Origins of the Federal Republic: Jurisdictional Controversies in the United States, 1775–1787. Philadelphia: University of Pennsylvania Press. ISBN 978-0-8122-1167-2.
  12. Jump up to:a b c d Adams, J.Q.; Strother-Adams, Pearlie (2001). Dealing with Diversity. Chicago: Kendall/Hunt. ISBN 0-7872-8145-X.
  13. Jump up^ LA Times
  14. Jump up^ Greene, Jack P.; Pole, J.R., eds. (2008). A Companion to the American Revolution. pp. 352–361.
  15. Jump up^ Bender, Thomas (2006). A Nation Among Nations: America's Place in World History. New York: Hill & Wang. p. 61.ISBN 978-0-8090-7235-4.
  16. Jump up to:a b Carlisle, Rodney P.; Golson, J. Geoffrey (2007). Manifest Destiny and the Expansion of America. Turning Points in History Series. ABC-CLIO. p. 238. ISBN 978-1-85109-833-0.
  17. Jump up^ "The Civil War and emancipation 1861–1865"Africans in America. Boston, MA: WGBH. No date. Retrieved March 26, 2013. 

Britannica Educational Publishing (2009). Wallenfeldt, Jeffrey H., ed. The American Civil War and Reconstruction: People, Politics, and Power. America at War. Rosen Publishing Group. p. 264. ISBN 978-1-61530-045-7.

  1. Jump up^ White, Donald W. (1996). "1: The Frontiers"The American Century. Yale University Press. ISBN 0-300-05721-0. Retrieved March 26, 2013.
  2. Jump up^ Maddison, Angus (2006). "Historical Statistics for the World Economy". The Netherlands: The Groningen Growth and Development Centre, Economics Department of the University of Groningen. Retrieved November 6, 2008.
  3. Jump up^ The European Union has a larger collective economy, but is not a single nation.
  4. Jump up^ "OECD Better Life Index". OECD Publishing. Retrieved November 25, 2012.
  5. Jump up to:a b "Household Income"Society at a Glance 2011: OECD Social Indicators. OECD Publishing. April 12, 2011.doi:10.1787/soc_glance-2011-6-en. Retrieved November 25, 2012.
  6. Jump up^ "Crisis squeezes income and puts pressure on inequality and poverty". OECD (2013). Retrieved July 26, 2013.
  7. Jump up^ Income distribution and poverty – OECDOECD
  8. Jump up^ "Census: U.S. Poverty Rate Spikes, Nearly 50 Million Americans Affected" CBS. November 15, 2012
  9. Jump up^ [1][dead link]
  10. Jump up^ "U.S. Workers World's Most Productive". CBS News. February 11, 2009. Retrieved April 23, 2013.
  11. Jump up^ "Manufacturing, Jobs and the U.S. Economy". Alliance for American Manufacturing. 2013.
  12. Jump up^ "Trends in world military expenditure, 2012". Stockholm International Peace Research Institute. April 2013. Retrieved April 15, 2013.
  13. Jump up^ Cohen, 2004:History and the Hyperpower
  14. Jump up^ BBC, April 2008:Country Profile: United States of America
  15. Jump up^ "Cartographer Put 'America' on the Map 500 years Ago".USA Today (Washington, D.C.). Associated Press. April 24, 2007. Retrieved November 30, 2008.
  16. Jump up^ DeLear, Byron (July 4, 2013) Who coined 'United States of America'? Mystery might have intriguing answer. "Historians have long tried to pinpoint exactly when the name 'United States of America' was first used and by whom. A new find suggests the man might have been George Washington himself."Christian Science Monitor (Boston, MA).
  17. Jump up^ "To the inhabitants of Virginia," by A PLANTER. Dixon and Hunter's Virginia Gazette #1287 – April 6, 1776, Williamsburg, Virginia. Letter is also included in Peter Force's American Archives Vol. 5
  18. Jump up^ Carter, Rusty (August 18, 2012). "You read it here first"[dead link]Virginia Gazette. "He did a search of the archives and found the letter on the front page of the April 6, 1776, edition, published by Hunter & Dixon."
  19. Jump up^ DeLear, Byron (August 16, 2012). "Who coined the name 'United States of America'? Mystery gets new twist." Christian Science Monitor (Boston, MA).
  20. Jump up^ Jefferson's "original Rough draught" of the Declaration of Independence
  21. Jump up^ "The Charters of Freedom". National Archives. Retrieved June 20, 2007.
  22. Jump up^ Mary Mostert (2005). The Threat of Anarchy Leads to the Constitution of the United States. CTR Publishing, Inc. p. 18.ISBN 978-0-9753851-4-2.
  23. Jump up^ "Get to Know D.C.". Historical Society of Washington, D.C. Retrieved July 11, 2011.
  24. Jump up^ Wilson, Kenneth G. (1993). The Columbia Guide to Standard American English. New York: Columbia University Press, pp. 27–28. ISBN 0-231-06989-8.
  25. Jump up^ Zimmer, Benjamin (November 24, 2005). "Life in These, Uh, This United States". University of Pennsylvania—Language Log. Retrieved January 5, 2013.
  26. Jump up^ G. H. Emerson, The Universalist Quarterly and General Review, Vol. 28 (Jan. 1891), p. 49, quoted in Zimmer paper above.
  27. Jump up^ For example, the U.S. embassy in Spain calls itself the embassy of the "Estados Unidos", literally the words "states" and "united", and also uses the initials "EE.UU.", the doubled letters implying plural use in Spanish [2] Elsewhere on the site "Estados Unidos de América" is used [3]
  28. Jump up^ "Who was first? New info on North America's earliest residents"Los Angeles Times. July 12, 2012.
  29. Jump up^ Smithsonian, 2004, Human Origins
  30. Jump up^ "The Cambridge encyclopedia of human paleopathology". Arthur C. Aufderheide, Conrado Rodríguez-Martín, Odin Langsjoen (1998). Cambridge University Press. p. 205. ISBN 0-521-55203-6
  31. Jump up^ Bianchine, Russo, 1992 pp. 225–232
  32. Jump up^ Mann, 2005 p. 44
  33. Jump up^ Thornton, 1987 p. 49
  34. Jump up^ Kessel, 2005 pp. 142–143
  35. Jump up^ Mercer Country Historical Society, 2005
  36. Jump up^ Juergens, 2011, p. 69
  37. Jump up^ Ripper, 2008 p. 6
  38. Jump up^ Ripper, 2008 p. 5
  39. Jump up^ Calloway, 1998, p. 55
  40. Jump up^ Vaughan, 1999, p .12
  41. Jump up^ Ranlet, 1999, pp. 140–141
  42. Jump up^ Ranlet, 1999, p. 137
  43. Jump up to:a b Rausch, 1994, p. 59
  44. Jump up^ Sturm, Circe. "Blood Politics, Racial Classification, and Cherokee National Identity: The Trials and Tribulations of the Cherokee Freedmen", American Indian Quarterly, Vol. 22, No. 1/2. (Winter – Spring, 1998), p. 231.
  45. Jump up^ Taylor, pp. 33–34
  46. Jump up^ Taylor, pp. 72, 74
  47. Jump up^ Walton, 2009, pp. 29–31
  48. Jump up^ Remini, 2007, pp. 2–3
  49. Jump up^ Johnson, 1997, pp. 26–30
  50. Jump up^ Berkin, 2007, p. 75
  51. Jump up^ Price, 2003
  52. Jump up^ Vaughan, 1999
  53. Jump up^ Walton, 2009, chapter 3
  54. Jump up^ Lemon, 1987
  55. Jump up^ Gordon, 2004, intro, chapters 1 and 2
  56. Jump up^ Russell, David Lee (2005). The American Revolution in the Southern Colonies. Jefferson, N.C., and London: McFarland, p. 12. ISBN 0-7864-0783-2.
  57. Jump up^ Clingan, 2000, p. 13
  58. Jump up^ Tadman, 2000, p. 1534
  59. Jump up^ Schneider, 2007, p. 484
  60. Jump up^ Lien, 1913, p. 522
  61. Jump up^ Davis, 1996, p. 7
  62. Jump up^ Quirk, 2011, p. 195
  63. Jump up^ Gold, 2006, pp. 32–35
  64. Jump up^ Bilhartz, Terry D.; Elliott, Alan C. (2007). Currents in American History: A Brief History of the United States. M.E. Sharpe.ISBN 978-0-7656-1817-7.
  65. Jump up^ Wood, Gordon S. (1998). The Creation of the American Republic, 1776–1787. UNC Press Books. p. 263. ISBN 978-0-8078-4723-7.
  66. Jump up^ Walton, 2009, pp. 38–39
  67. Jump up^ Walton, 2009, p. 35
  68. Jump up^ Humphrey, Carol Sue (2003). The Revolutionary Era: Primary Documents on Events from 1776 To 1800. Greenwood Publishing. pp. 8–10. ISBN 978-0-313-32083-5.
  69. Jump up^ Brown, Jerold E. (2001). Historical Dictionary of the U.S. Army. Greenwood Publishing. p. 126. ISBN 978-0-313-29322-1.
  70. Jump up^ Fabian Young, Alfred; Nash, Gary B.; Raphael, Ray (2011).Revolutionary Founders: Rebels, Radicals, and Reformers in the Making of the Nation. Random House Digital. pp. 4–7.ISBN 978-0-307-27110-5.
  71. Jump up^ Greene and Pole, A Companion to the American Revolution p 357
    Jonathan R. Dull, A Diplomatic History of the American Revolution (1987) p. 161
    Lawrence S. Kaplan, "The Treaty of Paris, 1783: A Historiographical Challenge," International History Review, Sept 1983, Vol. 5 Issue 3, pp 431–442
  72. Jump up^ Boyer, 2007, pp. 192–193
  73. Jump up^ Cogliano, Francis D. (2008). Thomas Jefferson: Reputation and Legacy. University of Virginia Press. p. 219. ISBN 978-0-8139-2733-6.
  74. Jump up^ Walton, 2009, p. 43
  75. Jump up^ Gordon, 2004, pp. 27,29
  76. Jump up^ Hall, Kermit (2002). The Oxford Companion to American Law. Oxford University Press. p. 26. ISBN 978-0-19-508878-6.
  77. Jump up^ Clark, Mary Ann (May 2012). Then We'll Sing a New Song: African Influences on America's Religious Landscape. Rowman & Littlefield. p. 47. ISBN 978-1-4422-0881-0.
  78. Jump up^ Billington, Ray Allen; Ridge, Martin (2001). Westward Expansion: A History of the American Frontier. UNM Press. p. 22. ISBN 978-0-8263-1981-4.
  79. Jump up^ "Louisiana Purchase". National Parks Services. Retrieved March 1, 2011.
  80. Jump up^ Wait, Eugene M. (1999). America and the War of 1812. Nova Publishers. p. 78. ISBN 978-1-56072-644-9.
  81. Jump up^ Klose, Nelson; Jones, Robert F. (1994). United States History to 1877. Barron's Educational Series. p. 150. ISBN 978-0-8120-1834-9.
  82. Jump up^ Morrison, Michael A. (1999). Slavery and the American West: The Eclipse of Manifest Destiny and the Coming of the Civil WarUniversity of North Carolina Press. pp. 13–21.ISBN 978-0-8078-4796-1.
  83. Jump up^ Kemp, Roger L. (2010). Documents of American Democracy: A Collection of Essential WorksMcFarland. p. 180. ISBN 978-0-7864-4210-2.
  84. Jump up^ McIlwraith, Thomas F.; Muller, Edward K. (2001). North America: The Historical Geography of a Changing Continent.Rowman & Littlefield. p. 61. ISBN 978-0-7425-0019-8.
  85. Jump up^ Smith-Baranzini, Marlene (1999). A Golden State: Mining and Economic Development in Gold Rush California. University of California Press. p. 20. ISBN 978-0-520-21771-3.
  86. Jump up^ Black, Jeremy (2011). Fighting for America: The Struggle for Mastery in North America, 1519–1871Indiana University Press. p. 275. ISBN 978-0-253-35660-4.
  87. Jump up to:a b Wishart, David J. (2004). Encyclopedia of the Great PlainsUniversity of Nebraska Press. p. 37. ISBN 978-0-8032-4787-1.
  88. Jump up^ Smith (2001), Grant, pp. 525–526
  89. Jump up to:a b Carlisle (2008), The Civil War and Reconstruction, p. 1
  90. Jump up^ Stuart Murray (2004). Atlas of American Military History. Infobase Publishing. p. 76. ISBN 978-1-4381-3025-5.
  91. Jump up^ Thomas F. McIlwraith; Edward K. Muller (2001). North America: The Historical Geography of a Changing Continent. Rowman & Littlefield. p. 186. ISBN 978-0-7425-0019-8.
  92. Jump up to:a b Patrick Karl O'Brien (2002). Atlas of World History. Oxford University Press. p. 184. ISBN 978-0-19-521921-0.
  93. Jump up^ "1860 Census". U.S. Census Bureau. Retrieved June 10, 2007. Page 7 lists a total slave population of 3,953,760.
  94. Jump up^ De Rosa, Marshall L. (1997). The Politics of Dissolution: The Quest for a National Identity and the American Civil War. Edison, NJ: Transaction. p. 266. ISBN 1-56000-349-9.
  95. Jump up^ Vinovskis, Maris (1990). "Toward a social history of the American Civil War: exploratory essays". Cambridge University Press. p. 6. ISBN 0-521-39559-3.
  96. Jump up to:a b G. Alan Tarr (2009). Judicial Process and Judicial Policymaking. Cengage Learning. p. 30. ISBN 978-0-495-56736-3.
  97. Jump up^ Brands (2012), Grant Takes On The KlanAmerican History, p. 46[unreliable source?]
  98. Jump up^ John Powell (2009). Encyclopedia of North American Immigration. Infobase Publishing. p. 74. ISBN 978-1-4381-1012-7.
  99. Jump up^ Rong, Xue Lan; Preissle, Judith (2009). Educating Immigrant Students in the 21st Century: What Educators Need to Know.Corwin Press. pp. 127–128. ISBN 978-1-4129-4095-5.
  100. Jump up^ Gates, John M. (August 1984). "War-Related Deaths in the Philippines"Pacific Historical Review. College of Wooster. Retrieved September 27, 2007.
  101. Jump up^ Zinn, HowardA People's History of the United States. New York: Harper Perennial Modern Classics, 2005. Chapter 13,"The Socialist Challange" pp. 321–357 ISBN 0-06-083865-5
  102. Jump up^ Zinn, HowardA People's History of the United States. New York: Harper Perennial Modern Classics, 2005. p. 327 ISBN 0-06-083865-5
  103. Jump up^ Foner, Eric; Garraty, John A. (1991). The Reader's Companion to American History. New York: Houghton Mifflin. p. 576. ISBN 0-395-51372-3.
  104. Jump up to:a b McDuffie, Jerome; Piggrem, Gary Wayne; Woodworth, Steven E. (2005). U.S. History Super Review. Piscataway, NJ: Research & Education Association. p. 418. ISBN 0-7386-0070-9.
  105. Jump up^ Voris, Jacqueline Van (1996). Carrie Chapman Catt: A Public Life. Women and Peace Series. New York City: Feminist Press at CUNY. p. vii. ISBN 1-55861-139-8. "Carrie Chapmann Catt led an army of voteless women in 1919 to pressure Congress to pass the constitutional amendment giving them the right to vote and convinced state legislatures to ratify it in 1920. ... Catt was one of the best-known women in the United States in the first half of the twentieth century and was on all lists of famous American women."
  106. Jump up^ Axinn, June; Stern, Mark J. (2007). Social Welfare: A History of the American Response to Need (7th ed.). Boston: Allyn & Bacon. ISBN 978-0-205-52215-6.
  107. Jump up^ Burton, Jeffrey F., et al. (July 2000). "A Brief History of Japanese American Relocation During World War II".Confinement and Ethnicity: An Overview of World War II Japanese American Relocation Sites. National Park Service. Retrieved April 2, 2010.
  108. Jump up^ See, for example, the aircraft production figures cited in Tooze 2006: in 1940, the Americans produced 6,019 aircraft; in 1941, 19,433; in 1942, almost 48,000; in 1943, an astonishing 85,898. Even more were to come in 1944. For comparison, in 1941, the German war economy could only manage about 12,000 aircraft.
  109. Jump up^ Leland, Anne; Oboroceanu, Mari–Jana (February 26, 2010)."American War and Military Operations Casualties: Lists and Statistics". Congressional Research Service. Retrieved February 18, 2011. p. 2.
  110. Jump up^ Kennedy, Paul (1989). The Rise and Fall of the Great Powers. New York: Vintage. p. 358. ISBN 0-679-72019-7.
    Indeed, World War II ushered in the zenith of U.S. power in what came to be called the American Century, as Leffler 2010, p. 67, indicates: "Truman presided over the greatest military and economic power the world had ever known. War production had lifted the United States out of the Great Depression and had inaugurated an era of unimagined prosperity. Gross national product increased by 60 percent during the war, total earnings by 50 percent. Despite social unrest, labor agitation, racial conflict, and teenage vandalism, Americans had more discretionary income than ever before. Simultaneously, the U.S. government had built up the greatest war machine in human history. By the end of 1942, the United States was producing more arms than all the Axis states combined, and, in 1943, it made almost three times more armaments than did the Soviet Union. In 1945, the United States had two-thirds of the world's gold reserves, three-fourths of its invested capital, half of its shipping vessels, and half of its manufacturing capacity. Its GNP was three times that of the Soviet Union and more than five times that of Britain. It was also nearing completion of the atomic bomb, a technological and production feat of huge costs and proportions."
  111. Jump up^ "The United States and the Founding of the United Nations, August 1941 – October 1945". U.S. Dept. of State, Bureau of Public Affairs, Office of the Historian. October 2005. Archived from the original on June 12, 2007. Retrieved June 11, 2007.
  112. Jump up^ Pacific War Research Society (2006). Japan's Longest Day. New York: Oxford University Press. ISBN 4-7700-2887-3.
  113. Jump up^ Gladchuk, John Joseph (2006). Hollywood and Anticommunism: HUAC and the Evolution of the Red Menace, 1935–1950. Routledge. ISBN 0-415-95568-8.
  114. Jump up^ Collins, Michael (1988). Liftoff: The Story of America's Adventure in Space. New York: Grove Press.
  115. Jump up^ Stern, Sheldon M (2003). Averting the Final Failure: John F. Kennedy and the Secret Cuban Missile Crisis Meetings. Stanford Nuclear Age Series. Stanford University Press.
  116. Jump up^ Dallek, Robert (2004). Lyndon B. Johnson: Portrait of a President. Oxford University Press. p. 169. ISBN 978-0-19-515920-2.

"Our Documents – Civil Rights Act (1964)". United States Department of Justice. Retrieved July 28, 2010. "Remarks at the Signing of the Immigration Bill, Liberty Island, New York". October 3, 1965. Retrieved January 1, 2012.

  1. Jump up^ Social Security History, the United States Social Security Administration
  2. Jump up^ Soss, 2010, p. 277
  3. Jump up^ Fraser, 1989
  4. Jump up^ Ferguson, 1986, pp. 43–53
  5. Jump up^ Williams, pp. 325–331
  6. Jump up^ Cronkite, Walter; Wagner, Heather Lehr (2009). Ronald Reagan. Great American Presidents Series. Infobase Publishing. p. 102. ISBN 978-1-4381-0308-2.

D'Souza, Dinesh (1999). Ronald Reagan: How an Ordinary Man Became an Extraordinary Leader. Simon and Schuster. p. 304. ISBN 978-0-684-84823-5. Niskanen, William A. (1988). Reaganomics: an insider's account of the policies and the people. Oxford University Press. p. 363. ISBN 978-0-19-505394-4.

  1. Jump up^ "General Article: The Iran-Contra Affair"American Experience. WGBH Educational Foundation. Retrieved March 11, 2013.

"Ronald Reagan"Your Presidents. White House. Retrieved March 11, 2013. Howell, Buddy Wayne (2006). The Rhetoric of Presidential Summit Diplomacy: Ronald Reagan and the U.S.-Soviet Summits, 1985—1988. Texas A&M University. p. 352.ISBN 978-0-549-41658-6. Kissinger, Henry (2011). Diplomacy. Simon and Schuster. pp. 781–784. ISBN 978-1-4391-2631-8. Mann, James (2009). The Rebellion of Ronald Reagan: A History of the End of the Cold War. Penguin. p. 432.ISBN 978-1-4406-8639-9.

  1. Jump up^ Hayes, 2009
  2. Jump up^ US, 2013
  3. Jump up^ Burns, 2008
  4. Jump up^ Levy, 1996, p. 442
  5. Jump up^ Wallander, 2003
  6. Jump up^ Lee Banville. "Intervention In Iraq?"PBS NewsHour. MacNeil/Lehrer Productions. Retrieved March 6, 2013.

"Rebuilding Iraq"Student Activites. Scholastic Inc. Retrieved March 6, 2013. "20 years after, Bush defends Gulf War as 'moral'"NBC News. Associated Press. January 20, 2011. Retrieved March 6, 2013. Greenblatt, Alan (February 24, 2011). "Twenty Years Later, First Iraq War Still Resonates"NPR. Retrieved March 6, 2013.

  1. Jump up^ Voyce, Bill (August 21, 2006). "Why the Expansion of the 1990s Lasted So Long". Iowa Workforce Information Network. Retrieved August 16, 2007.

Dale, Reginald (February 18, 2000). "Did Clinton Do It, or Was He Lucky?"The New York Times. Retrieved March 6, 2013. Mankiw, N. Gregory (2008). Macroeconomics. Cengage Learning. p. 559. ISBN 978-0-324-58999-3.

  1. Jump up^ Flashback 9/11: As It Happened. Fox News. September 9, 2011. Retrieved March 6, 2013.

"America remembers Sept. 11 attacks 11 years later"CBS News. Associated Press. September 11, 2012. Retrieved March 6, 2013. "Day of Terror Video Archive"CNN. 2005. Retrieved March 6, 2013.

  1. Jump up^ Walsh, Kenneth T. (December 9, 2008). "The 'War on Terror' Is Critical to President George W. Bush's Legacy"U.S. News & World Report. Retrieved March 6, 2013.

Haass, Richard N. (October 15, 2001). "The Bush Administration's Response to September 11th—and Beyond"Terrorism. Council on Foreign Relations. Retrieved March 6, 2013. Atkins, Stephen E. (2011). The 9/11 Encyclopedia: Second Edition. ABC-CLIO. p. 872. ISBN 978-1-59884-921-9.

  1. Jump up^ Smith, Michael (November 14, 2001). "Switch to guerrilla warfare"The Daily Telegraph (London). Retrieved March 6, 2013.

Tucker, Spencer (2009). United States Leadership in Wartime. ABC-CLIO. p. 952. ISBN 978-1-59884-172-5.

  1. Jump up^ "Many Europeans Oppose War in Iraq"USA Today. February 14, 2003. Retrieved September 1, 2008.

"Most Americans Support War with Iraq, Shows New Pew/CFR Poll – Commentary by Lee Feinstein". Council on Foreign Affairs. October 10, 2002. Retrieved March 7, 2013.

  1. Jump up^ Wong, Edward (February 15, 2008). "Overview: The Iraq War"The New York Times. Retrieved March 7, 2013.

"The Invasion of Iraq"Frontline. WGBH Educational Foundation. February 26, 2004. Retrieved March 7, 2013. Johnson, James Turner (2005). The War to Oust Saddam Hussein: Just War and the New Face of Conflict. Rowman & Littlefield. p. 159. ISBN 978-0-7425-4956-2.

  1. Jump up^ Durando, Jessica; Rae Green, Shannon (December 21, 2011). "Timeline: Key moments in the Iraq War"USA Today. Associated Press. Retrieved March 7, 2013.

"Last American Troops Leave Iraq Marking End of War"Fox News. Associated Press. December 18, 2011. Retrieved March 7, 2013.

  1. Jump up^ Washington, Jesse; Rugaber, Chris (September 9, 2011)."African-American Economic Gains Reversed By Great Recession"Huffington Post. Associated Press. Retrieved March 7, 2013.

Hargreaves, Steve (November 5, 2008). "Obama rides economy to White House"CNN. Retrieved March 7, 2013. One Year In, a Closer Look at the Obama Presidency. MacNeil/Lehrer Production. 2010. Retrieved March 7, 2012.

  1. Jump up^ Bowden, Mark (2012). The Finish: The Killing of Osama Bin Laden. Grove Press. p. 304. ISBN 978-0-8021-9410-7.

"Kill/Capture"Frontline. WGBH Educational Foundation. May 10, 2011. Retrieved March 7, 2013. Brown, Adrian (September 10, 2012). "Osama Bin Laden's death: How it happened"BBC News. Retrieved March 7, 2013.

  1. Jump up^ Lubowski, Ruben; Vesterby, Marlow; Bucholtz, Shawn (July 21, 2006). "AREI Chapter 1.1: Land Use". Economic Research Service. Retrieved March 9, 2009.
  2. Jump up^ "United States". Encyclopædia Britannica. Retrieved March 25, 2008 (area given in square miles).
  3. Jump up^ "Population by Sex, Rate of Population Increase, Surface Area and Density"Demographic Yearbook 2005. UN Statistics Division. Retrieved March 25, 2008 (area given in square kilometers).
  4. Jump up^ "World Factbook: Area Country Comparison Table". Yahoo Education. Retrieved February 28, 2007.
  5. Jump up^ O'Hanlon, Larry. "Supervolcano: What's Under Yellowstone?". Discovery Channel. Archived from the original on May 25, 2012. Retrieved June 13, 2007.
  6. Jump up^ Perkins, Sid (May 11, 2002). "Tornado Alley, USA"Science News. Archived from the original on July 1, 2007. Retrieved September 20, 2006.
  7. Jump up^ Morin, Nancy. "Vascular Plants of the United States".Plants. National Biological Service. Retrieved October 27, 2008.
  8. Jump up^ "Global Significance of Selected U.S. Native Plant and Animal Species". SDI Group. February 9, 2001. Retrieved January 20, 2009.
  9. Jump up^ "Numbers of Insects (Species and Individuals)". Smithsonian Institution. Retrieved January 20, 2009.
  10. Jump up^ "National Park Service Announces Addition of Two New Units" (Press release). National Park Service. February 28, 2006. Retrieved June 13, 2006.
  11. Jump up to:a b "Federal Land and Buildings Ownership". Republican Study Committee. May 19, 2005. Retrieved March 9, 2009.
  12. Jump up^ "NOAA: Gulf of Mexico 'Dead Zone' Predictions Feature Uncertainty". U.S. Geological Survey (USGS). June 21, 2012. Retrieved June 23, 2012.
  13. Jump up^ "What is hypoxia?". Louisiana Universities Marine Consortium (LUMCON). Retrieved May 18, 2013.
  14. Jump up^ Forest Resources of the United States
  15. Jump up^ Land Use Changes Involving Forestry in the United States: 1952 to 1997, With Projections to 2050
  16. Jump up^ Daynes & Sussman, 2010, pp. 3, 72, 74–76, 78
  17. Jump up^ Hays, Samuel P. (2000). A History of Environmental Politics since 1945.
  18. Jump up^ Rothman, Hal K. (1998).The Greening of a Nation? Environmentalism in the United States since 1945
  19. Jump up^ Turner, James Morton (2012). The Promise of Wilderness
  20. Jump up to:a b "2010 Census Data". U.S. Census Bureau. Retrieved March 29, 2011.
  21. Jump up^
  22. Jump up^ Camarota, Steven A.; Jensenius, Karen (July 2008)."Homeward Bound: Recent Immigration Enforcement and the Decline in the Illegal Alien Population". Center for Immigration Studies. Retrieved August 6, 2008.
  23. Jump up^ "Statistical Abstract of the United States"United States Census Bureau. 2005.
  24. Jump up^ "Executive Summary: A Population Perspective of the United States". Population Resource Center. May 2000. Archived from the original on June 4, 2007. Retrieved December 20, 2007.
  25. Jump up^ "Births: Preliminary Data for 2010"National Vital Statistics Reports, Volume 60. National Center for Health Statistics. 2011. Retrieved August 17, 2012.
  26. Jump up^ "U.S. Legal Permanent Residents: 2012"Office of Immigration Statistics Annual Flow Report.
  27. Jump up^ "Yearbook of Immigration Statistics: 2011 – Persons Obtaining Legal Permanent Resident Status by Region and Country of Birth: Fiscal Years 2002 to 2011 (Table 3)". U.S. Dept. of Homeland Security. Retrieved February 4, 2013.
  28. Jump up^ "Yearbook of Immigration Statistics: 2007 – Persons Obtaining Legal Permanent Resident Status by Region and Country of Birth: Fiscal Years 1998 to 2007 (Table 3)". U.S. Dept. of Homeland Security. Retrieved February 4, 2013.
  29. Jump up^ Donaldson James, Susan (April 8, 2011). "Gay Americans Make Up 4 Percent of Population"ABC News. Retrieved August 26, 2012.
  30. Jump up^ National Survey of Sexual Health and Behavior. Retrieved January 6, 2013.
  31. Jump up to:a b c d "Ancestry 2000". U.S.Census Bureau. June 2004. Retrieved June 13, 2007.
  32. Jump up to:a b c Humes, Karen R.; Jones, Nicholas A.; Ramirez, Roberto R. (March 2011). "Overview of Race and Hispanic Origin: 2010". U.S. Census Bureau. Retrieved March 29, 2011.
  33. Jump up^ "B03001. Hispanic or Latino Origin by Specific Origin"2007 American Community Survey. U.S. Census Bureau. Retrieved September 26, 2008.
  34. Jump up^ "Tables 41 and 42—Native and Foreign-Born Populations"Statistical Abstract of the United States 2009. U.S. Census Bureau. Retrieved October 11, 2009.
  35. Jump up to:a b "National Vital Stattistics Reports: Volume 61, Number 1. Births: Final Data for 2012". August 2012. Retrieved November 25, 2012.
  36. Jump up^ U.S. Census Bureau: "U.S. Census Bureau Delivers Final State 2010 Census Population Totals for Legislative Redistricting" see custom table, 2nd worksheet
  37. Jump up^ Exner, Rich (July 3, 2012). "Americans under age one now mostly minorities, but not in Ohio: Statistical Snapshot"The Plain Dealer (Cleveland, OH). Retrieved July 29, 2012.
  38. Jump up^ "An Older and More Diverse Nation by Midcentury" (Press release). U.S. Census Bureau. August 14, 2008. Retrieved March 29, 2013.
  39. Jump up^ "United States—Urban/Rural and Inside/Outside Metropolitan Area (GCT-P1. Population, Housing Units, Area, and Density: 2000)". U.S. Census Bureau. April 1, 2000. Retrieved September 23, 2008.
  40. Jump up^ "Table 1: Annual Estimates of the Resident Population for Incorporated Places Over 100,000, Ranked by July 1, 2008 Population: April 1, 2000 to July 1, 2008"2008 Population Estimates. U.S. Census Bureau, Population Division. July 1, 2009. Archived from the original on December 7, 2009.
  41. Jump up to:a b "Table 5. Estimates of Population Change for Metropolitan Statistical Areas and Rankings: July 1, 2007 to July 1, 2008".2008 Population Estimates. U.S. Census Bureau. March 19, 2009. Archived from the original on December 7, 2009.
  42. Jump up^ "Raleigh and Austin are Fastest-Growing Metro Areas". U.S. Census Bureau. March 19, 2009. Retrieved October 11, 2009.
  43. Jump up^ "Figure A–3. Census Regions, Census Divisions, and Their Constituent States" (PDF). U.S. Census Bureau. Retrieved 2007-06-17.
  44. Jump up^ "Annual Estimates of the Population of Metropolitan and Micropolitan Statistical Areas: April 1, 2010 to July 1, 2011". U.S. Census Bureau. Retrieved 2012-06-07.
  45. Jump up^ "United States"Modern Language Association. Retrieved September 2, 2013.
  46. Jump up^ "Language Spoken at Home by the U.S. Population, 2010", American Community Survey, U.S. Census Bureau, in World Almanac and Book of Facts 2012, p. 615.
  47. Jump up^ "Foreign Language Enrollments in United States Institutions of Higher Learning". MLA. fall 2002. Retrieved October 16, 2006.
  48. Jump up^ "The Constitution of the State of Hawaii, Article XV, Section 4". Hawaii Legislative Reference Bureau. November 7, 1978. Retrieved June 19, 2007.
  49. Jump up^ Dicker, Susan J. (2003). Languages in America: A Pluralist View. Clevedon, UK: Multilingual Matters. pp. 216, 220–25.ISBN 1-85359-651-5.
  50. Jump up^ "California Code of Civil Procedure, Section 412.20(6)". Legislative Counsel, State of California. Retrieved December 17, 2007. "California Judicial Council Forms". Judicial Council, State of California. Retrieved December 17, 2007.
  51. Jump up^ "Among Wealthy Nations ... U.S. Stands Alone in its Embrace of Religion"Pew Global Attitudes Project. Pew Research Center. December 19, 2002. Retrieved October 23, 2008.
  52. Jump up to:a b Mississippians Go to Church the Most; Vermonters, Least
  53. Jump up to:a b c d "Religious Composition of the U.S."U.S. Religious Landscape Survey. Pew Forum on Religion & Public Life. 2007. Retrieved October 23, 2008.
  54. Jump up to:a b c Kosmin, Barry A., Egon Mayer, and Ariela Kaysar (December 19, 2001). "American Religious Identification Survey 2001". CUNY Graduate Center. Retrieved September 16, 2011.
  55. Jump up^ "United States". Retrieved May 2, 2013.
  56. Jump up^ Media, Minorities, and Meaning: A Critical Introduction — Page 88, Debra L. Merskin – 2010
  57. Jump up^ Merica, Dan (June 12, 2012). "Pew Survey: Doubt of God Growing Quickly among Millennials". CNN. Retrieved June 14, 2012.
  58. Jump up^ "American Confidence In Organized Religion At All Time Low"Huffington Post. July 12, 2012. Retrieved July 14, 2012.
  59. Jump up^ "Religion Among the Millennials". The Pew Forum on Religion & Public Life. Retrieved August 29, 2012.
  60. Jump up^ "Table 55—Marital Status of the Population by Sex, Race, and Hispanic Origin: 1990 to 2007"Statistical Abstract of the United States 2009. U.S. Census Bureau. Retrieved October 11, 2009.
  61. Jump up^ "Women's Advances in Education". Columbia University, Institute for Social and Economic Research and Policy. 2006. Archived from the original on June 9, 2007. Retrieved June 6, 2007.
  62. Jump up^ "Teenage birth rate statistics – countries compared – NationMaster People". Retrieved July 10, 2011.
  63. Jump up^ "U.S. teen birth rates fall to historic lows". CBS News. April 10, 2012. Retrieved July 4, 2013.
  64. Jump up^ Strauss, Lilo T., et al. (November 24, 2006). "Abortion Surveillance—United States, 2003"MMWR. Centers for Disease Control, National Center for Chronic Disease Prevention and Health Promotion, Division of Reproductive Health. Retrieved June 17, 2007.
  65. Jump up^ FASTSTATS – Births and Natality
  66. Jump up^ The World Factbook
  67. Jump up^ Jardine, Cassandra (October 31, 2007). "Why adoption is so easy in America"The Daily Telegraph (London).
  68. Jump up^ "Child Adoption: Trends and policies". United Nations Department of Economic and Social Affairs. 2009.
  69. Jump up^
  70. Jump up^ Scheb, John M.; Scheb, John M. II (2002). An Introduction to the American Legal System. Florence, KY: Delmar, p. 6. ISBN 0-7668-2759-3.
  71. Jump up^ Killian, Johnny H. "Constitution of the United States". The Office of the Secretary of the Senate. Retrieved February 11, 2012.
  72. Jump up^ Davidson, Kavitha A. (March 21, 2013). "Democracy Index 2013: Global Democracy At A Standstill, The Economist Intelligence Unit's Annual Report Shows"The Huffington Post. Retrieved August 23, 2013.
  73. Jump up^ "Corruption Perceptions Index 2012". Transparency International. Retrieved February 4, 2013.
  74. Jump up^ "The Legislative Branch". United States Diplomatic Mission to Germany. Retrieved August 20, 2012.
  75. Jump up^ "The Process for impeachment". ThinkQuest. Retrieved August 20, 2012.
  76. Jump up^ "The Executive Branch". The White House. Retrieved August 20, 2012.
  77. Jump up^ Bloch, Matt; Ericson, Matthew; Quealy, Kevin (May 30, 2013)."Census 2010: Gains and Losses in Congress"The New York Times.
  78. Jump up^ "What is the Electoral College". National Archives. Retrieved August 21, 2012.
  79. Jump up^ Cossack, Roger (July 12, 2000). "Beyond politics: Why Supreme Court justices are appointed for life". CNN. Retrieved August 21, 2012.
  80. Jump up^ "Nebraska (state, United States) : Agriculture"Britannica Online Encyclopedia. Retrieved November 11, 2012.
  81. Jump up^ Feldstein, Fabozzi, 2011, p. 9
  82. Jump up^ Schultz, 2009, pp. 164, 453, 503
  83. Jump up^ Schultz, 2009, p. 38
  84. Jump up^ Borreca, Richard (October 18, 1999). "'The Goal Was Democracy for All"Honolulu Star-Bulletin. Retrieved February 11, 2012.
  85. Jump up^ See 8 U.S.C. § 1101(a)(36) and 8 U.S.C. § 1101(a)(38) U.S. Federal Code, Immigration and Nationality Act. 8 U.S.C. § 1101a
  86. Jump up^ Jenkins, William O. (2009). American Samoa: Issues Associated with Potential Changes to the Current System for Adjudicating Matters of Federal Law. DIANE Publishing. p. 8.ISBN 978-1-4379-0704-9.
  87. Jump up^ US General Accounting Office, U.S. Insular Areas. Application of the U.S. Constitution. November 1997. p. 9. Appendix I, pp. 23–38. Retrieved April 29, 2013.
  88. Jump up^ Fonseca, Felicia (July 17, 2010). "Native American nations debate sovereignty after Iroquois passport dispute"Deseret News (Salt Lake City). Associated Press. Retrieved July 28, 2012.
  89. Jump up^ Etheridge, Eric; Deleith, Asger (August 19, 2009). "A Republic or a Democracy?"New York Times blogs. Retrieved November 7, 2010. "The US system seems essentially a two-party system. ..."
  90. Jump up^ Grigsby, Ellen (2008). Analyzing Politics: An Introduction to Political Science. Cengage Learning. pp. 106–7. ISBN 0-495-50112-3.
  91. Jump up^ "Congressional Profile Resources"Office of the Clerk of the United States House of Representatives.
  92. Jump up^ "50 State Governors". Retrieved February 27, 2013.
  93. Jump up^ "CHART: No more WASPs in Presidential Races". US News and World Reports. Retrieved August 3, 2013.
  94. Jump up^ Knickerbocker, Brad (August 19, 2012). "US government and politics no longer run by WASPs. Does it matter?"DC Decoder (blog) (Boston MA: The Christian Science Monitor). Retrieved December 27, 2012.
  95. Jump up^ "For the first time, no WASPs in election". NPR. August 19, 2012. Retrieved August 3, 2013.
  96. Jump up^ "What is the G8?". University of Toronto. Retrieved February 11, 2012.
  97. Jump up^ Dumbrell, John; Schäfer, Axel (2009). America's 'Special Relationships': Foreign and Domestic Aspects of the Politics of Alliance. p. 45.
  98. Jump up^ Ek, Carl, and Ian F. Fergusson (September 3, 2010)."Canada–U.S. Relations". Congressional Research Service. Retrieved August 28, 2011.
  99. Jump up^ Vaughn, Bruce (August 8, 2008). "Australia: Background and U.S. Relations". Congressional Research Service. Retrieved August 28, 2011.
  100. Jump up^ Vaughn, Bruce (May 27, 2011). "New Zealand: Background and Bilateral Relations with the United States". Congressional Research Service. Retrieved August 28, 2011.
  101. Jump up^ Lum, Thomas (January 3, 2011). "The Republic of the Philippines and U.S. Interests". Congressional Research Service. Retrieved August 3, 2011.
  102. Jump up^ Chanlett-Avery, Emma, et al. (June 8, 2011). "Japan-U.S. Relations: Issues for Congress" (PDF). Congressional Research Service. Retrieved August 28, 2011.
  103. Jump up^ Manyin, Mark E., Emma Chanlett-Avery, and Mary Beth Nikitin (July 8, 2011). "U.S.–South Korea Relations: Issues for Congress". Congressional Research Service. Retrieved August 28, 2011.
  104. Jump up^ Addis, Casey L. (February 14, 2011). "Israel: Background and U.S. Relations". Congressional Research Service. Retrieved August 28, 2011.
  105. Jump up^ Shah, Anup (April 13, 2009). "U.S. and Foreign Aid Assistance". Retrieved October 11, 2009.
  106. Jump up^ "Who Pays Taxes in America?". Citizens for Tax Justice. April 12, 2012.
  107. Jump up^ Porter, Eduardo (August 14, 2012). "America's Aversion to Taxes"The New York Times. Retrieved August 15, 2012. "In 1965, taxes collected by federal, state and municipal governments amounted to 24.7 percent of the nation's output. In 2010, they amounted to 24.8 percent. Excluding Chile and Mexico, the United States raises less tax revenue, as a share of the economy, than every other industrial country."
  108. Jump up to:a b "CBO Historical Tables-February 2013". Congressional Budget Office. February 5, 2013. Retrieved April 23, 2013.
  109. Jump up^ Prasad, M.; Deng, Y. (April 2, 2009). "Taxation and the worlds of welfare"Socio-Economic Review 7 (3): 431–457.doi:10.1093/ser/mwp005. Retrieved May 5, 2013.
  110. Jump up^ Crook, Clive (February 10, 2012). "U.S. Taxes Really Are Unusually Progressive"The Atlantic (Washington DC). Retrieved April 3, 2013.
  111. Jump up to:a b Matthews, Dylan (September 19, 2012). "Other countries don't have a "47%""The Washington Post. Retrieved October 29, 2013.
  112. Jump up^ "How Much Do People Pay in Federal Taxes?". Peter G. Peterson Foundation. Retrieved April 3, 2013.
  113. Jump up to:a b c "The Distribution of Household Income and Federal Taxes, 2008 and 2009". Congressional Budget Office. July 2012. Retrieved April 3, 2013.
  114. Jump up^ "Table T12-0178 Baseline Distribution of Cash Income and Federal Taxes Under Current Law". The Tax Policy Center. Retrieved October 29, 2013.
  115. Jump up^ Harris, Benjamin H. (November 2009). "Corporate Tax Incidence and Its Implications for Progressivity". Tax Policy Center. Retrieved October 9, 2013.
  116. Jump up^ Gentry, William M. (December 2007). "A Review of the Evidence on the Incidence of the Corporate Income Tax".OTA Paper 101. Office of Tax Analysis, US Department of the Treasury. Retrieved October 9, 2013.
  117. Jump up^ Fullerton, Don; Metcalf, Gilbert E. (2002). "Tax Incidence". In A.J. Auerbach and M. Feldstein. Handbook of Public Economics. Amsterdam: Elsevier Science B.V. pp. 1788–1839. Retrieved October 9, 2013.
  118. Jump up^ Musgrave, R.A.; Carroll, J.J.; Cook, L.D.; Frane, L. (March 1951). "Distribution of Tax Payments by Income Groups: A Case Study for 1948"National Tax Journal 4 (1): 1–53. Retrieved October 9, 2013.
  119. Jump up^ Agadoni, Laura. "Characteristics of a Regressive Tax". Houston Chronicle Small Business blog.
  120. Jump up^ TPC Tax Topics | Payroll Taxes
  121. Jump up^ "The Design of the Original Social Security Act"Social Security Online. U.S. Social Security Administration. Retrieved April 3, 2013.
  122. Jump up^ Blahous, Charles (February 24, 2012). "The Dark Side of the Payroll Tax Cut"Defining Ideas. Hoover Institution. Retrieved April 3, 2013.
  123. Jump up^ Stephen, Ohlemacher (March 3, 2013). "Tax bills for rich families approach 30-year high"The Seattle Times. Associated Press. Retrieved April 3, 2013.
  124. Jump up^ "Who will pay what in 2013 taxes?"The Seattle Times. Associated Press. March 3, 2013. Retrieved April 3, 2013.
  125. Jump up^ Malm, Elizabeth (February 20, 2013). "Comments on Who Pays? A Distributional Analysis of the Tax Systems in All 50 States". Tax Foundation. Retrieved April 3, 2013.
  126. Jump up^ "Debt to the Penny (Daily History Search Application)". TreasuryDirect. Retrieved April 23, 2013.
  127. Jump up^ "US national debt surpasses $16 trillion"Boston Business Journal blog. September 5, 2012. Retrieved April 23, 2013.
  128. Jump up^ Thornton, Daniel L. (Nov./Dec. 2012). "The U.S. Deficit/Debt Problem: A Longer–Run Perspective"Federal Reserve Bank of St. Louis Review. Retrieved May 7, 2013.
  129. Jump up^ Lopez, Luciana (January 28, 2013). "Fitch backs away from downgrade of U.S. credit rating"Reuters. Retrieved March 26, 2013.
  130. Jump up^ "Federal Debt: Answers to Frequently Asked Questions".Government Accountability Office. Retrieved April 16, 2012.
  131. Jump up^ Lynch, David J. (March 21, 2013). "Economists See No Crisis With U.S. Debt as Economy Gains"Bloomberg (New York). Retrieved March 25, 2013.
  132. Jump up^ "The Air Force in Facts and Figures (Armed Forces Manpower Trends, End Strength in Thousands)"Air Force Magazine. May 2009. Retrieved October 9, 2009.
  133. Jump up^ "What does Selective Service provide for America?". Selective Service System. Retrieved February 11, 2012.
  134. Jump up^ "Base Structure Report, Fiscal Year 2008 Baseline". Department of Defense. Retrieved October 9, 2009.
  135. Jump up^ "Active Duty Military Personnel Strengths by Regional Area and by Country (309A)". Department of Defense. March 31, 2010. Retrieved October 7, 2010.
  136. Jump up^ Ikenberry, G. John (March/April 2004). "Illusions of Empire: Defining the New American Order"Foreign Affairs. Archived from the original on May 25, 2012. Kreisler, Harry, and Chalmers Johnson (January 29, 2004). "Conversations with History". University of California at Berkeley. Retrieved June 21, 2007.
  137. Jump up^ "The 15 Countries with the Highest Military Expenditure in 2011". Stockholm International Peace Research Institute. Retrieved February 4, 2013.
  138. Jump up^ "Compare"CIA World Factbook. RealClearWorld. Retrieved February 4, 2013.
  139. Jump up^ "Fiscal Year 2013 Historical Tables"Budget of the U.S. Government. White House OMB. Retrieved November 24, 2012.
  140. Jump up^ "Fiscal Year 2012 Budget Request Overview". Department of Defense. February 2011. Retrieved July 25, 2011.
  141. Jump up^ Basu, Moni (December 18, 2011). "Deadly Iraq War Ends with Exit of Last U.S. Troops". CNN. Retrieved February 5, 2012.
  142. Jump up^ "Operation Iraqi Freedom". Iraq Coalition Casualty Count. February 5, 2012. Retrieved February 5, 2012.
  143. Jump up^ Cherian, John (April 7, 2012). "Turning Point"Frontline (The Hindu Group). Archived from the original on December 2, 2012. Retrieved December 2, 2012. "There are currently 90,000 U.S. troops deployed in the country."
  144. Jump up^ "Department of Defence Defence Casualty Analysis System". Department of Defense. November 2013. Retrieved November 11, 2013.
  145. Jump up^ "Local Police Departments, 2003". U.S. Dept. of Justice, Bureau of Justice Statistics. May 2006. Retrieved December 7, 2011.
  146. Jump up^ "U.S. Federal LAw Enforcement Agencies, Who Governs & What They Do". Retrieved August 21, 2012.
  147. Jump up^ Plea Bargains
  148. Jump up^ Interview with Judge Michael McSpadden PBS interview, December 16, 2003
  149. Jump up^ "Uniform Crime Reporting Statistics". U.S Department of Justice Federal Bureau of Investigation. Retrieved 16 November 2013.
  150. Jump up^ "Crime in the United States, 2011". FBI '(Uniform Crime Statistics—Murder)'. Retrieved January 23, 2013.
  151. Jump up^ "UNODC Homicide Statistics". United Nations Office on Drugs and Crime (UNODC). Retrieved January 23, 2013.
  152. Jump up^ "Eighth United Nations Survey of Crime Trends and Operations of Criminal Justice Systems (2001–2002)". United Nations Office on Drugs and Crime (UNODC). March 31, 2005. Retrieved May 18, 2008.
  153. Jump up^ Homicide, Suicide, and Unintentional Firearm Fatality: Compa ... : Journal of Trauma and Acute Care Surgery
  154. Jump up^ Simpson, Ian (May 2, 2013). "Maryland becomes latest U.S. state to abolish death penalty"Yahoo! NewsReuters. Archived from the original on June 24, 2013. Retrieved July 4, 2013.
  155. Jump up^ "U.S. Executions Since 1976". Clark Prosecutor. Retrieved December 5, 2012.
  156. Jump up^ "Searchable Execution Database"Death Penalty Information Center. Retrieved October 10, 2012.
  157. Jump up^ "Executions Around the World". Death Penalty Information Center. 2010. Retrieved July 23, 2011.
  158. Jump up^ Schmidt, Steffen W.; Shelley, Mack C.; Bardes, Barbara A. (2008). American Government & Politics Today. Cengage Learning. p. 591. ISBN 978-0-495-50228-9.
  159. Jump up^ Walmsley, Roy (2005). "World Prison Population List". King's College London, International Centre for Prison Studies. Archived from the original on June 28, 2007. For the latest data, see "Prison Brief for United States of America". King's College London, International Centre for Prison Studies. June 21, 2006. Archived from the original on August 4, 2007. For other estimates of the incarceration rate in China and North Korea see Adams, Cecil (February 6, 2004). "Does the United States Lead the World in Prison Population?". The Straight Dope. Retrieved October 11, 2007.
  160. Jump up^ Barkan, Steven E.; Bryjak, George J. (2011). Fundamentals of Criminal Justice: A Sociological View. Jones & Bartlett. p. 23.ISBN 978-1-4496-5439-9.
  161. Jump up^ Iadicola, Peter; Shupe, Anson (October 26, 2012). Violence, Inequality, and Human Freedom. Rowman & Littlefield. p. 456. ISBN 978-1-4422-0949-7.
  162. Jump up^ "World Prison Population List (8th edition)". King's College London, International Centre for Prison Studies. 2009. Retrieved July 23, 2011.
  163. Jump up^ DeLisi, Matt; Conis, Peter John (2011). American Corrections: Theory, Research, Policy, and Practice. Jones & Bartlett. p. 21. ISBN 978-1-4496-4540-3.
  164. Jump up^ Clear, Todd R.; Cole, George F.; Reisig, Michael Dean (2008).American Corrections. Cengage Learning. p. 485. ISBN 978-0-495-55323-6.
  165. Jump up^ Mears, Daniel P. (2010). American Criminal Justice Policy: An Evaluation Approach to Increasing Accountability and Effectiveness. Cambridge University Press. p. 72. ISBN 978-0-521-76246-5.
  166. Jump up^ Fuchs, Erin (October 1, 2013). "Why Louisiana Is The Murder Capital Of America"Business Insider.
  167. Jump up^ "Gross Domestic Product, 1 Decimal (GDP)"Federal Reserve Bank of St. Louis. June 26, 2013. Retrieved June 26, 2013.
  168. Jump up^ "National Income and Product Accounts Gross Domestic Product, 2nd Quarter 2013 (advance estimate)" (Press release). Bureau of Economic Analysis. July 31, 2013. Retrieved August 23, 2013. Change is based on chained 2005 dollars. Quarterly growth is expressed as an annualized rate.
  169. Jump up^ "Consumer Price Index for All Urban Consumers: All Items (CPIAUCSL)"Federal Reserve Bank of St. Louis. April 5, 2013. Retrieved April 5, 2013.
  170. Jump up^ "Civilian Employment-Population Ratio (EMRATIO)".Federal Reserve Bank of St. Louis. April 5, 2013. Retrieved April 5, 2013.
  171. Jump up^ "Employment Situation Summary" (Press release). United States Department of Labor. August 2, 2013. Retrieved August 2, 2013.
  172. Jump up^ "Labor Force Statistics from the Current Population Survey".Bureau of Labor Statistics. United States Department of Labor. April 7, 2013. Retrieved April 7, 2013.
  173. Jump up^ "Income, Poverty, and Health Insurance Coverage in the United States: 2010". U.S. Census Bureau. September 14, 2010. Retrieved September 16, 2011.
  174. Jump up^ "Federal Debt: Total Public Debt (GFDEBTN)"Federal Reserve Bank of St. Louis. April 5, 2013. Retrieved April 5, 2013.
  175. Jump up^ "Flow of Funds Accounts of the United States: Flows and Outstandings Fourth Quarter 2011" (Press release). U.S. Federal Reserve. March 8, 2012. Retrieved April 17, 2012.
  176. Jump up^ Wright, Gavin; Czelusta, Jesse (2007). "Resource-Based Growth Past and Present", in Natural Resources: Neither Curse Nor Destiny, ed. Daniel Lederman and William Maloney. World Bank. p. 185. ISBN 0-8213-6545-2.
  177. Jump up^ "EU27 Population 502.5 Million at 1 January 2011" (Press release). Eurostat Press Office. July 28, 2011. Retrieved June 19, 2012.
  178. Jump up^ "Currency Composition of Official Foreign Exchange Reserves". International Monetary Fund. Retrieved April 9, 2012.
  179. Jump up to:a b "Trade Statistics". Greyhill Advisors. Retrieved October 6, 2011.
  180. Jump up^ "Top Ten Countries with which the U.S. Trades". U.S. Census Bureau. August 2009. Retrieved October 12, 2009.
  181. Jump up^ "National debt: Whom does the US owe?"The Christian Science Monitor (Boston MA). February 4, 2011. Retrieved July 14, 2011.
  182. Jump up^ "Market highlights for first half-year 2010". World Federation of Exchanges. Retrieved November 22, 2012.
  183. Jump up^ "GDP by Industry". Greyhill Advisors. Retrieved October 13, 2011.
  184. Jump up to:a b "USA Economy in Brief". U.S. Dept. of State, International Information Programs. Archived from the original on March 12, 2008.
  185. Jump up^ "Table 724—Number of Tax Returns, Receipts, and Net Income by Type of Business and Industry: 2005" (XLS). U.S. Census Bureau. Retrieved October 12, 2009.
  186. Jump up^ "Table 964—Gross Domestic Product in Current and Real (2000) Dollars by Industry: 2006". U.S. Census Bureau. May 2008. Retrieved October 12, 2009.
  187. Jump up^ "Rank Order—Oil (Production)"The World Factbook. CIA. Retrieved October 12, 2009."Rank Order—Oil (Consumption)"The World Factbook. CIA. Retrieved October 12, 2009."Crude Oil and Total Petroleum Imports Top 15 Countries". U.S. Energy Information Administration. September 29, 2009. Retrieved October 12, 2009.
  188. Jump up^ "Corn". U.S. Grains Council. Archived from the original on January 12, 2008. Retrieved March 13, 2008.
  189. Jump up^ "Soybean Demand Continues to Drive Production". Worldwatch Institute. November 6, 2007. Retrieved March 13, 2008.
  190. Jump up^ Coal Statistics
  191. Jump up^ Minerals Production
  192. Jump up^ "Sony, LG, Wal-Mart among Most Extendible Brands". Cheskin. June 6, 2005. Retrieved June 19, 2007.
  193. Jump up^ "Personal Consumption Expenditures (PCE)/Gross Domestic Product (GDP)" FRED Graph, Federal Reserve Bank of St. Louis
  194. Jump up^ Fuller, Thomas (June 15, 2005). "In the East, Many EU Work Rules Don't Apply"International Herald Tribune (Paris). Retrieved June 28, 2007.
  195. Jump up^ "Doing Business in the United States". World Bank. 2006. Retrieved June 28, 2007.
  196. Jump up^ Ray, Rebecca; Sanes, Milla; Schmitt, John (May 2013). No-Vacation Nation RevisitedCenter for Economic and Policy Research. Retrieved September 8, 2013.
  197. Jump up^ Bernard. Tara Siegel (February 22, 2013). "In Paid Family Leave, U.S. Trails Most of the Globe"The New York Times. Retrieved August 27, 2013.
  198. Jump up^ "Total Economy Database, Summary Statistics, 1995–2010"Total Economy Database. The Conference Board. September 2010. Retrieved September 20, 2009.
  199. Jump up^ "Most Americans say U.S. in recession despite data: poll".Reuters. April 28, 2011.
  200. Jump up^ "OECD Better Life Index". OECD. Retrieved November 25, 2012.
  201. Jump up^ "Household Income for States: 2010 and 2011" United States Census, American Community Survey Briefs, September 2012, Appendix Table 1, p. 5
  202. Jump up^ "Global Food Security Index". London: The Economist Intelligence Unit. March 5, 2013. Retrieved April 8, 2013.
  203. Jump up^ Rector, Robert; Sheffield, Rachel (September 13, 2011)."Understanding Poverty in the United States: Surprising Facts About America's Poor". Heritage Foundation. Retrieved April 8, 2013.
  204. Jump up^ Kenworthy, L. (August 20, 2010) "The best inequality graph, updated" Consider the Evidence
  205. Jump up^ "Chart Book: The Legacy of the Great Recession — Center on Budget and Policy Priorities". March 12, 2013. Retrieved March 27, 2013.
  206. Jump up^ "Bureau of Labor Statistics Data". December 1, 2010. Retrieved March 27, 2013.
  207. Jump up^ Hagopian, Kip; Ohanian, Lee (August 1, 2012). "The Mismeasure of Inequality"Policy Review (Hoover Institution Stanford University). Retrieved August 22, 2013.
  208. Jump up^ "2013 Human Development Report". United Nations Development Programme. Retrieved July 28, 2013.
  209. Jump up^ Yen, Hope (28 July 2013). 80 Percent Of U.S. Adults Face Near-Poverty, Unemployment: SurveyThe Huffington Post.Retrieved July 28, 2013.
  210. Jump up^ Schwartz, Nelson (March 3, 2013). "Recovery in U.S. Is Lifting Profits, but Not Adding Jobs"The New York Times. Retrieved March 18, 2013.
  211. Jump up^ McKinnon, John D. (January 1, 2013). "Analysis: 77% of Households to See Tax Increase"The Wall Street Journal (blog) (New York). Retrieved April 8, 2013.
  212. Jump up^ "U.S. Poverty: Census Finds Nearly Half Of Americans Are Poor Or Low-Income"The Huffington Post. December 15, 2011. Retrieved June 5, 2013.
  213. Jump up^ Alvaredo, Facundo; Atkinson, Anthony B.Piketty, Thomas;Saez, Emmanuel (2013). "The Top 1 Percent in International and Historical Perspective"Journal of Economic Perspectives. Retrieved August 16, 2013.
  214. Jump up^ Smeeding, T.M. (2005). "Public Policy: Economic Inequality and Poverty: The United States in Comparative Perspective".Social Science Quarterly 86: 955–983. doi:10.1111/j.0038-4941.2005.00331.x.
  215. Jump up^ Saez, E. (October 2007). "Table A1: Top Fractiles Income Shares (Excluding Capital Gains) in the U.S., 1913–2005". UC Berkeley. Retrieved July 24, 2008."Field Listing—Distribution of Family Income—Gini Index"The World Factbook. CIA. June 14, 2007. Retrieved June 17, 2007.
  216. Jump up^ Saez, Emmanuel (September 3, 2013). "Striking it Richer: The Evolution of Top Incomes in the United States"UC Berkley.Retrieved September 11, 2013.
  217. Jump up^ Mishel, Lawrence (April 26, 2012). The wedges between productivity and median compensation growthEconomic Policy Institute. Retrieved October 18, 2013.
  218. Jump up^ "The Most Important Chart in American Politics"Time (New York). February 4, 2013.
  219. Jump up^ Gongloff, Mark (September 17, 2013). "Median Income Falls For 5th Year, Inequality At Record High"The Huffington Post. Retrieved October 4, 2013.
  220. Jump up^ "Household Food Security in the United States in 2011". USDA. September 2012. Retrieved April 8, 2013.
  221. Jump up^ Domhoff, G. William (December 2006). "Table 4: Percentage of Wealth Held by the Top 10% of the Adult Population in Various Western Countries"Power in America. University of California at Santa Cruz, Sociology Dept. Retrieved August 21, 2006.
  222. Jump up^ Altman, Roger C. "The Great Crash, 2008"Foreign Affairs. Retrieved February 27, 2009.
  223. Jump up^ "Americans' wealth drops $1.3 trillion". CNN MOney. June 11, 2009.
  224. Jump up^ "U.S. household wealth falls $11.2 trillion in 2008". Reuters. March 12, 2009.
  225. Jump up^ Black, Duncan (February 5, 2013). "401Ks are a disaster".USA Today. Retrieved 3 April 2013.
  226. Jump up^ Siedle, Ted (March 20, 2013). "The Greatest Retirement Crisis In American History"Forbes. Retrieved 3 April 2013.
  227. Jump up^ "Interstate FAQ (Question #3)". Federal Highway Administration. 2006. Retrieved March 4, 2009.
  228. Jump up^ "China Expressway System to Exceed US Interstates"New Geography (Grand Forks, ND). January 22, 2011. Retrieved September 16, 2011.
  229. Jump up^ "China overtakes US in car sales"The Guardian (London). January 8, 2010. Retrieved July 10, 2011.
  230. Jump up^ "Motor vehicles statistics – countries compared worldwide". NationMaster. Retrieved July 10, 2011.
  231. Jump up^ "Household, Individual, and Vehicle Characteristics"2001 National Household Travel Survey. U.S. Dept. of Transportation, Bureau of Transportation Statistics. Retrieved August 15, 2007.
  232. Jump up^ "Daily Passenger Travel"2001 National Household Travel Survey. U.S. Dept. of Transportation, Bureau of Transportation Statistics. Retrieved August 15, 2007.
  233. Jump up^ Renne, John L.; Wells, Jan S. (2003). "Emerging European-Style Planning in the United States: Transit-Oriented Development". Rutgers University. p. 2. Retrieved June 11, 2007.
  234. Jump up^ "NatGeo surveys countries' transit use: guess who comes in last". May 18, 2009. Retrieved July 10, 2011.
  235. Jump up^ "Intercity Passenger Rail: National Policy and Strategies Needed to Maximize Public Benefits from Federal Expenditures". U.S. Government Accountability Office. November 13, 2006. Retrieved June 20, 2007.
  236. Jump up^ "Amtrak Ridership Records". Amtrak. June 8, 2011. Retrieved February 29, 2012.
  237. Jump up^ McGill, Tracy (January 1, 2011). "3 Reasons Light Rail Is an Efficient Transportation Option for U.S. Cities"MetaEfficient. Retrieved June 14, 2013.
  238. Jump up^ "Bicycling to Work". Network of Employers for Traffic Safety. Retrieved July 10, 2011.
  239. Jump up^ "Scheduled Passengers Carried". International Air Transport Association (IATA). 2011. Retrieved February 17, 2012.
  240. Jump up^ "Passenger Traffic 2006 Final". Airports Council International. July 18, 2007. Retrieved August 15, 2007.[dead link]
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  242. Jump up^ "Rank Order—Oil (Consumption)"The World Factbook. CIA. September 6, 2007. Retrieved September 14, 2007.
  243. Jump up^ "Atomic Renaissance"The Economist (London). September 6, 2007. Retrieved September 6, 2007.
  244. Jump up^ "BP Statistical Review of World Energy" (XLS). British Petroleum. June 2007. Retrieved February 22, 2010.
  245. Jump up^ Ames, Paul (May 30, 2013). "Could fracking make the Persian Gulf irrelevant?"Salon. Retrieved May 30, 2012. "Since November, the United States has replaced Saudi Arabia as the world's biggest producer of crude oil. It had already overtaken Russia as the leading producer of natural gas."
  246. Jump up^ "Edison's Story". Lemelson Center. Retrieved August 21, 2012.
  247. Jump up^ Benedetti, François (December 17, 2003). "100 Years Ago, the Dream of Icarus Became Reality". Fédération Aéronautique Internationale (FAI). Archived from the originalon September 12, 2007. Retrieved August 15, 2007.
  248. Jump up^ "Research and Development (R&D) Expenditures by Source and Objective: 1970 to 2004". U.S. Census Bureau. Retrieved June 19, 2007.
  249. Jump up^ MacLeod, Donald (March 21, 2006). "Britain Second in World Research Rankings"The Guardian (London). Retrieved May 14, 2006.
  250. Jump up^ "Exploring the Digital Nation—Computer and Internet Use at Home". U.S. Dept. of Commerce, Economics and Statistics Administration. November 8, 2011. Retrieved April 11, 2012.
  251. Jump up^ "Report: 90% of Americans own a computerized gadget". CNN. February 3, 2011. Retrieved December 27, 2012.
  252. Jump up^ "ISAAA Brief 39-2008: Executive Summary—Global Status of Commercialized Biotech/GM Crops: 2008". International Service for the Acquisition of Agri-Biotech Applications. p. 15. Retrieved July 16, 2010.
  253. Jump up^ Rosenstone, Steven J. (December 17, 2009). "Public Education for the Common Good". University of Minnesota. Retrieved March 6, 2009.
  254. Jump up^ "Ages for Compulsory School Attendance ...". U.S. Dept. of Education, National Center for Education Statistics. Retrieved June 10, 2007.
  255. Jump up^ "Statistics About Non-Public Education in the United States". U.S. Dept. of Education, Office of Non-Public Education. Retrieved June 5, 2007.
  256. Jump up to:a b AP (June 25, 2013). "U.S. education spending tops global list, study shows". CBS. Retrieved October 5, 2013.
  257. Jump up^ "QS World University Rankings". Topuniversities. Retrieved July 10, 2011.
  258. Jump up^ "Top 200 – The Times Higher Education World University Rankings 2010–2011". Retrieved July 10, 2011.
  259. Jump up^ "Educational Attainment in the United States: 2003". U.S. Census Bureau. Retrieved August 1, 2006.
  260. Jump up^ For more detail on U.S. literacy, see A First Look at the Literacy of America's Adults in the 21st century, U.S. Department of Education (2003).
  261. Jump up^ "Human Development Indicators". United Nations Development Programme, Human Development Reports. 2005. Archived from the original on June 20, 2007. Retrieved January 14, 2008.
  262. Jump up^ "Education at a Glance 2013". OECD. Retrieved October 5, 2013.
  263. Jump up^ Student Loan Debt Exceeds One Trillion DollarsNPR, April 4, 2012. Retrieved September 8, 2013.
  264. Jump up^ "Country Comparison: Life Expectancy at Birth"The World Factbook. CIA. Retrieved October 25, 2011.
  265. Jump up to:a b Murray, Christopher J.L.; et al (July 10, 2013). "The State of US Health, 1990–2010: Burden of Diseases, Injuries, and Risk Factors"Journal of the American Medical Association.doi:10.1001/jama.2013.13805. Retrieved July 11, 2013.
  266. Jump up^ MacAskill, Ewen (August 13, 2007). "US Tumbles Down the World Ratings List for Life Expectancy"The Guardian(London). Retrieved August 15, 2007.
  267. Jump up^ "Slideshow: Most obese countries". Reuters. Retrieved November 22, 2012.
  268. Jump up^ "Prevalence of Overweight and Obesity Among Adults: United States, 2003–2004". Centers for Disease Control and Prevention, National Center for Health Statistics. Retrieved June 5, 2007.
  269. Jump up^ Schlosser, Eric (2002). Fast Food Nation. New York: Perennial. p. 240. ISBN 0-06-093845-5.
  270. Jump up^ "Fast Food, Central Nervous System Insulin Resistance, and Obesity"Arteriosclerosis, Thrombosis, and Vascular Biology. American Heart Association. 2005. Retrieved June 17, 2007.
  271. Jump up^ "Country Comparison: Infant Mortality Rate"The World Factbook. CIA. Retrieved October 25, 2011.
  272. Jump up^ Cowen, Tyler (October 5, 2006). "Poor U.S. Scores in Health Care Don't Measure Nobels and Innovation"The New York Times. Retrieved October 9, 2012.
  273. Jump up^ Whitman, Glen; Raad, Raymond. "Bending the Productivity Curve: Why America Leads the World in Medical Innovation". The Cato Institute. Retrieved October 9, 2012.
  274. Jump up^ OECD Health Data 2000: A Comparative Analysis of 29 Countries [CD-ROM] (OECD: Paris, 2000). See also "The U.S. Healthcare System: The Best in the World or Just the Most Expensive?". University of Maine. 2001. Retrieved November 29, 2006.
  275. Jump up^ Abelson, Reed (June 10, 2008). "Ranks of Underinsured Are Rising, Study Finds"The New York Times. Retrieved October 25, 2008.
  276. Jump up^ Blewett, Lynn A. et al. (December 2006). "How Much Health Insurance Is Enough? Revisiting the Concept of Underinsurance". Medical Care Research and Review 63 (6): 663–700. doi:10.1177/1077558706293634ISSN 1077-5587PMID 17099121.
  277. Jump up^ Fahrenthold, David A. (April 5, 2006). "Mass. Bill Requires Health Coverage"The Washington Post. Retrieved June 19, 2007.
  278. Jump up^ "Health Care Law 54% Favor Repeal of Health Care Law". Rasmussen Reports. Retrieved October 13, 2012.
  279. Jump up^ "Debate on ObamaCare to intensify in the wake of landmark Supreme Court ruling"Fox News. June 29, 2012. Retrieved October 14, 2012.
  280. Jump up^ "Statue of Liberty"World Heritage. UNESCO. Retrieved October 20, 2011.
  281. Jump up^ Thompson, William; Hickey, Joseph (2005). Society in Focus. Boston: Pearson. ISBN 0-205-41365-X.
  282. Jump up^ Fiorina, Morris P.; Peterson, Paul E. (2000). The New American Democracy. London: Longman, p. 97. ISBN 0-321-07058-5.
  283. Jump up^ Holloway, Joseph E. (2005). Africanisms in American Culture, 2d ed. Bloomington: Indiana University Press, pp. 18–38. ISBN 0-253-34479-4. Johnson, Fern L. (1999). Speaking Culturally: Language Diversity in the United States. Thousand Oaks, Calif., London, and New Delhi: Sage, p. 116. ISBN 0-8039-5912-5.
  284. Jump up^ Huntington, Samuel P. (2004). "Chapters 2–4"Who are We?: The Challenges to America's National Identity. Simon and Schuster.
  285. Jump up^ AP (June 25, 2007). "Americans give record $295B to charity"USA Today. Retrieved October 4, 2013.
  286. Jump up^ "International comparisons of charitable giving". Charities Aid Foundation. November 2006. Retrieved October 4, 2013.
  287. Jump up^ "Individualism". Clearly Cultural. Retrieved February 28, 2009.
  288. Jump up to:a b "A Family Affair: Intergenerational Social Mobility across OECD Countries"Economic Policy Reforms: Going for Growth. OECD. 2010. Retrieved September 20, 2010. Blanden, Jo; Gregg, Paul; Malchin, Stephen (April 2005)."Intergenerational Mobility in Europe and North America". Centre for Economic Performance. Archived from the originalon June 23, 2006.
  289. Jump up^ Dave Serchuk. Happy Country=Social Mobility? Forbes.12/7/2011
  290. Jump up^ Gould, Elise (October 10, 2012). "U.S. lags behind peer countries in mobility." Economic Policy Institute. Retrieved July 15, 2013.
  291. Jump up^ CAP: Understanding Mobility in America. April 26, 2006
  292. Jump up^ DeParle, Jason (January 4, 2012). Harder for Americans to Rise From Lower RungsThe New York Times. Retrieved September 8, 2013.
  293. Jump up^ Schneider, Donald (July 29, 2013). "A Guide to Understanding International Comparisons of Economic Mobility". The Heritage Foundation. Retrieved August 22, 2013.
  294. Jump up^ Gutfield, Amon (2002). American Exceptionalism: The Effects of Plenty on the American Experience. Brighton and Portland: Sussex Academic Press. p. 65. ISBN 1-903900-08-5.
  295. Jump up^ Zweig, Michael (2004). What's Class Got To Do With It, American Society in the Twenty-First Century. Ithaca, NY: Cornell University Press. ISBN 0-8014-8899-0. "Effects of Social Class and Interactive Setting on Maternal Speech". Education Resource Information Center. Retrieved January 27, 2007.
  296. Jump up^ Eichar, Douglas (1989). Occupation and Class Consciousness in America. Westport, CT: Greenwood Press.ISBN 0-313-26111-3.
  297. Jump up^ O'Keefe, Kevin (2005). The Average American. New York: PublicAffairs. ISBN 1-58648-270-X.
  298. Jump up^ Village Voice: 100 Best Films of the 20th century (2001). Filmsite.
  299. Jump up^ "Sight and Sound Top Ten Poll 2002". Archived from the original on May 25, 2012..[dead link]. British Film Institute. Retrieved June 19, 2007.
  300. Jump up^ "Nigeria surpasses Hollywood as world's second largest film producer" (Press release). United Nations. May 5, 2009. Retrieved February 17, 2013.
  301. Jump up^ Daniels, Les (1998). Superman: The Complete History (1st ed.). Titan Books. p. 11. ISBN 1-85286-988-7.
  302. Jump up^ "Media Statistics > Television Viewing by Country". NationMaster. Retrieved June 3, 2007.
  303. Jump up^ "Broadband and Media Consumption". eMarketer. June 7, 2007. Retrieved June 10, 2007.
  304. Jump up^ "TV Fans Spill into Web Sites". eMarketer. June 7, 2007. Retrieved June 10, 2007.
  305. Jump up^ "Top Sites in United States". Alexa. 2010. Retrieved March 27, 2010.
  306. Jump up to:a b Biddle, Julian (2001). What Was Hot!: Five Decades of Pop Culture in America. New York: Citadel, p. ix. ISBN 0-8065-2311-5.
  307. Jump up^ Bloom, Harold. 1999. Emily Dickinson. Broomall, PA: Chelsea House. p. 9. ISBN 0-7910-5106-4.
  308. Jump up^ Buell, Lawrence (Spring/Summer 2008). "The Unkillable Dream of the Great American Novel: Moby-Dick as Test Case".American Literary History 20 (1–2): 132–155.doi:10.1093/alh/ajn005ISSN 0896-7148.
  309. Jump up^ Quinn, Edward (2006). A Dictionary of Literary and Thematic Terms. Infobase, p. 361. ISBN 0-8160-6243-9. Seed, David (2009). A Companion to Twentieth-Century United States Fiction. Chichester, West Sussex: John Wiley and Sons, p. 76.ISBN 1-4051-4691-5. Meyers, Jeffrey (1999). Hemingway: A Biography. New York: Da Capo, p. 139. ISBN 0-306-80890-0.
  310. Jump up^ Summers, Lawrence H. (November 19, 2006). "The Great Liberator"The New York Times. Retrieved May 17, 2013.
  311. Jump up^ McFadden, Robert D. (January 9, 2013). "James M. Buchanan, Economic Scholar and Nobel Laureate, Dies at 93"The New York Times. Retrieved May 17, 2013.
  312. Jump up^ Brown, Milton W. (1988 1963). The Story of the Armory Show. New York: Abbeville. ISBN 0-89659-795-4.
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JHU Press. p. 229. ISBN 978-0-8018-5959-5., Book

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Texas A&M University Press. p. 320. ISBN 978-1-60344-254-1. "Presidential environmental policies, 1933–2009", Book

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John Wiley & Sons, Jan 13, 2011. p. 1376. ISBN 978-1-118-04494-0., Book

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Infobase Publishing. p. 398. ISBN 978-0-8160-3337-9., Book

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