In 1507, the German cartographer Martin Waldseemüller produced a world map on which he named the lands of the Western Hemisphere America in honor of the Italian explorer and cartographer Amerigo Vespucci (Latin: Americus Vespucius). 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 Washington'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. The first known publication of the phrase "United States of America" was in an anonymous essay in The Virginia Gazette newspaper in Williamsburg, Virginia, on April 6, 1776.
The second draft of the Articles of Confederation, prepared by John Dickinson and completed by June 17, 1776, at the latest, declared "The name of this Confederation shall be the 'United States of America'". The final version of the Articles sent to the states for ratification in late 1777 contains the sentence "The Stile of this Confederacy shall be 'The United States of America'". In June 1776, Thomas Jefferson wrote the phrase "UNITED STATES OF AMERICA" in all capitalized letters in the headline of his "original Rough draught" of the Declaration of Independence. This draft of the document did not surface until June 21, 1776, and it is unclear whether it was written before or after Dickinson used the term in his June 17 draft of the Articles of Confederation.
The short form "United States" is also standard. Other common forms are the "U.S.", the "USA", and "America". Colloquial names are the "U.S. of A." and, internationally, the "States". "Columbia", a name popular in poetry and songs of the late 18th century, derives its origin from Christopher Columbus; it appears in the name "District of Columbia".
The phrase "United States" was originally 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. The singular form—e.g., "the United States is"—became popular after the end of the American Civil War. The singular form is now standard; the plural form is retained in the idiom "these United States". The difference is more significant than usage; it is a difference between a collection of states and a unit.
A citizen of the United States is an "American". "United States", "American" and "U.S." refer to the country adjectivally ("American values", "U.S. forces"). In English, the word "American" rarely refers to topics or subjects not directly connected with the United States.
The first inhabitants of North America migrated from Siberia by way of the Bering land bridge and arrived at least 15,000 years ago, though increasing evidence suggests an even earlier arrival. After crossing the land bridge, the first Americans moved southward, either along the Pacific coast or through an interior ice-free corridor between the Cordilleran and Laurentide ice sheets. The Clovis culture appeared around 11,000 BC, and it is considered to be an ancestor of most of the later indigenous cultures of the Americas. While the Clovis culture was thought, throughout the late 20th century, to represent the first human settlement of the Americas, in recent years consensus has changed in recognition of pre-Clovis cultures.
Most settlers in every colony were small farmers, but other industries developed within a few decades as varied as the settlements. Cash crops included tobacco, rice, and wheat. Extraction industries grew up in furs, fishing and lumber. Manufacturers produced rum and ships, and by the late colonial period, Americans were producing one-seventh of the world's iron supply. Cities eventually dotted the coast to support local economies and serve as trade hubs. English colonists were supplemented by waves of Scotch-Irish and other groups. As coastal land grew more expensive, freed indentured servants pushed further west.
A large-scale slave trade with English privateers was begun. The life expectancy of slaves was much higher in North America than further south, because of less disease and better food and treatment, leading to a rapid increase in the numbers of slaves. Colonial society was largely divided over the religious and moral implications of slavery, and colonies passed acts for and against the practice. But by the turn of the 18th century, African slaves were replacing indentured servants for cash crop labor, especially in southern regions.
With the British colonization of Georgia in 1732, the 13 colonies that would become the United States of America were established. All had local governments with elections open to most free men, with a growing devotion to the ancient rights of Englishmen and a sense of self-government stimulating support for republicanism. With extremely high birth rates, low death rates, and steady settlement, the colonial population grew rapidly. Relatively small Native American populations were eclipsed. The Christian revivalist movement of the 1730s and 1740s known as the Great Awakening fueled interest in both religion and religious liberty.
During the Seven Years' War (in the United States, known as 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, the 13 British 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. The colonies' distance from Britain had allowed the development of self-government, but their success motivated monarchs to periodically seek to reassert royal authority.
After having arrived in the Hawaiian islands in 1778, Captain Cook sailed north and then northeast to explore the west coast of North America north of the Spanish settlements in Alta California. He made landfall on the Oregon coast at approximately 44°30′ north latitude, naming his landing point Cape Foulweather. Bad weather forced his ships south to about 43° north before they could begin their exploration of the coast northward. In March 1778, Cook landed on Bligh Island and named the inlet "King George's Sound". He recorded that the native name was Nutka or Nootka, apparently misunderstanding his conversations at Friendly Cove/Yuquot; his informant may have been explaining that he was on an island (itchme nutka, a place you can "go around"). There may also have been confusion with Nuu-chah-nulth, the natives' autonym (a name for themselves). It may also have simply been based on Cook's mispronunciation of Yuquot, the native name of the place.
Effects on and interaction with native populations
In the early days of colonization, many European settlers were subject to food shortages, disease, and attacks from Native Americans. Native Americans were also often at war with neighboring tribes and allied with Europeans in their colonial wars. At the same time, however, many natives and settlers came to depend on each other. Settlers traded for food and animal pelts, natives for guns, ammunition and other European wares. Natives taught many settlers where, when and how to cultivate corn, beans, and squash. European missionaries and others felt it was important to "civilize" the Native Americans and urged them to adopt European agricultural techniques and lifestyles.
Captain James Cook's last voyage included sailing along the coast of North America and Alaska searching for a Northwest Passage for approximately nine months. He returned to Hawaii to resupply, initially exploring the coasts of Maui and the big island, trading with locals and then making anchor at Kealakekua Bay in January 1779. When his ships and company left the islands, a ship's mast broke in bad weather, forcing them to return in mid-February. Cook would be killed days later.[fn 9][fn 10]
The American Revolutionary War was the first successful colonial war of independence against a European power. Americans had developed an ideology of "republicanism" asserting that government rested on the will of the people as expressed in their local legislatures. They demanded their rights as Englishmen and "no taxation without representation". The British insisted on administering the empire through Parliament, and the conflict escalated into war.
The Second Continental Congress unanimously adopted the Declaration of Independence on July 4, which recognized, in a long preamble, that all men are created equal and endowed by their Creator with unalienable rights and that those rights were not being protected by Great Britain, and declared, in the words of the resolution, that the thirteen United Colonies formed an independent nation and had no further allegiance to the British crown. The fourth day of July is celebrated annually as Independence Day. The Second Continental Congress declared on September 9 "where, heretofore, the words 'United Colonies' have been used, the stile be altered for the future to the 'United States' ". In 1777, the Articles of Confederation established a weak government that operated until 1789.
Although the federal government criminalized the international slave trade in 1808, after 1820, cultivation of the highly profitable cotton crop exploded in the Deep South, and along with it, the slave population. The Second Great Awakening, especially 1800–1840, converted millions to evangelical Protestantism. In the North, it energized multiple social reform movements, including abolitionism; in the South, Methodists and Baptists proselytized among slave populations.
Map of the states and territories of the United States, c. 1834
The California Gold Rush of 1848–49 spurred western migration and the creation of additional western states. After the American Civil War, new transcontinental railways made relocation easier for settlers, expanded internal trade and increased conflicts with Native Americans. Over a half-century, the loss of the American bison (sometimes called "buffalo") was an existential blow to many Plains Indians cultures. In 1869, a new Peace Policy nominally promised to protect Native-Americans from abuses, avoid further war, and secure their eventual U.S. citizenship. Nonetheless, conflicts and state-sanctioned murder, including the California Genocide, continued throughout the West into the 1900s.
Differences of opinion regarding the slavery of Africans and African Americans ultimately led to the American Civil War. Initially, states entering the Union had alternated between slave and free states, keeping a sectional balance in the Senate, while free states outstripped slave states in population and in the House of Representatives. But with additional western territory and more free-soil states, tensions between slave and free states mounted with arguments over federalism and disposition of the territories, whether and how to expand or restrict slavery. This led to Missouri's controversial denouncement of the issue, as well as the formation of many short-lived territories such as the State of Scott, a county that left Tennessee to stay anti-slavery.
With the 1860 election of Abraham Lincoln, the first president from the largely anti-slavery Republican Party, conventions in thirteen slave states ultimately declared secession and formed the Confederate States of America (the "South"), while the federal government (the "Union") maintained that secession was illegal. In order to bring about this secession, military action was initiated by the secessionists, and the Union responded in kind. The ensuing war would become the deadliest military conflict in American history, resulting in the deaths of approximately 618,000 soldiers as well as many civilians. The South fought for the freedom to own slaves, while the Union at first simply fought to maintain the country as one united whole. Nevertheless, as casualties mounted after 1863 and Lincoln delivered his Emancipation Proclamation, the main purpose of the war from the Union's viewpoint became the abolition of slavery. Indeed, when the Union ultimately won the war in April 1865, each of the states in the defeated South was required to ratify the Thirteenth Amendment, which prohibited slavery.
Three amendments were added to the U.S. Constitution in the years after the war: the aforementioned Thirteenth as well as the Fourteenth Amendment providing citizenship to the nearly four million African Americans who had been slaves, and the Fifteenth Amendment ensuring in theory that African Americans had the right to vote. The war and its resolution led to a substantial increase in federal power aimed at reintegrating and rebuilding the South while guaranteeing the rights of the newly freed slaves.
Reconstruction began in earnest following the war. While President Lincoln attempted to foster friendship and forgiveness between the Union and the former Confederacy, an assassin's bullet on April 14, 1865, drove a wedge between North and South again. Republicans in the federal government made it their goal to oversee the rebuilding of the South and to ensure the rights of African Americans. They persisted until the Compromise of 1877 when the Republicans agreed to cease protecting the rights of African Americans in the South in order for Democrats to concede the presidential election of 1876.
Southern white Democrats, calling themselves "Redeemers", took control of the South after the end of Reconstruction. From 1890 to 1910, so-called Jim Crow lawsdisenfranchised most blacks and some poor whites throughout the region. Blacks faced racial segregation, especially in the South. They also occasionally experienced vigilante violence, including lynching.
Further immigration, expansion, and industrialization
After World War II the United States and the Soviet Union jockeyed for power during what became known as the Cold War, driven by an ideological divide between capitalism and communism and, according to the school of geopolitics, a divide between the maritime Atlantic and the continental Eurasian camps. They dominated the military affairs of Europe, with the U.S. and its NATO allies on one side and the USSR and its Warsaw Pact allies on the other. The U.S. developed a policy of containment towards the expansion of communist influence. While the U.S. and Soviet Union engaged in proxy wars and developed powerful nuclear arsenals, the two countries avoided direct military conflict.
In 2010, the Obama administration passed the Affordable Care Act, which made the most sweeping reforms to the nation's healthcare system in nearly five decades, including mandates, subsidies and insurance exchanges. The law caused a significant reduction in the number and percentage of people without health insurance, with 24 million covered during 2016, but remains controversial due to its impact on healthcare costs, insurance premiums, and economic performance. Although the recession reached its trough in June 2009, voters remained frustrated with the slow pace of the economic recovery. The Republicans, who stood in opposition to Obama's policies, won control of the House of Representatives with a landslide in 2010 and control of the Senate in 2014.
The land area of the entire United States is approximately 3,800,000 square miles (9,841,955 km2), with the contiguous United States making up 2,959,064 square miles (7,663,940.6 km2) of that. Alaska, separated from the contiguous United States by Canada, is the largest state at 663,268 square miles (1,717,856.2 km2). Hawaii, occupying an archipelago in the central Pacific, southwest of North America, is 10,931 square miles (28,311 km2) in area. The populated territories of Puerto Rico, American Samoa, Guam, Northern Mariana Islands, and U.S. Virgin Islands together cover 9,185 square miles (23,789 km2). Measured by only land area, the United States is third in size behind Russia and China, just ahead of Canada.
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.[fn 7] The Encyclopædia Britannica, for instance, lists the size of the United States as 3,677,649 square miles (9,525,067 km2), as they do not count the country's coastal or territorial waters.The World Factbook, which includes those waters, gives 3,796,742 square miles (9,833,517 km2).
The U.S. ecology is 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. The United States is home to 428 mammal species, 784 bird species, 311 reptile species, and 295 amphibian species. About 91,000 insect species have been described. The bald eagle is both the national bird and national animal of the United States, and is an enduring symbol of the country itself.
There are 59 national parks and hundreds of other federally managed parks, forests, and wilderness areas. Altogether, the government owns about 28% of the country's land area. Most of this is protected, though some is leased for oil and gas drilling, mining, logging, or cattle ranching; about .86% is used for military purposes.
The U.S. Census Bureau estimated the country's population to be 325,719,178 as of July 1, 2017, and to be adding 1 person (net gain) every 13 seconds, or about 6,646 people per day. The U.S. population almost quadrupled during the 20th century, from 76.2 million in 1900 to 281.4 million in 2000. The third most populous nation in the world, after China and India, the United States is the only major industrialized nation in which large population increases are projected. In the 1800s the average woman had 7.04 children; by the 1900s this number had decreased to 3.56. Since the early 1970s the birth rate has been below the replacement rate of 2.1 with 1.86 children per woman in 2014. Foreign-born immigration has caused the U.S. population to continue its rapid increase with the foreign-born population doubling from almost 20 million in 1990 to over 40 million in 2010, representing one-third of the population increase. The foreign-born population reached 45 million in 2015. The United States has a very diverse population; 37 ancestry groups have more than one million members.German Americans are the largest ethnic group (more than 50 million) – followed by Irish Americans (circa 37 million), Mexican Americans (circa 31 million) and English Americans (circa 28 million).
Minorities (as defined by the Census Bureau as all those beside non-Hispanic, non-multiracial whites) constituted 37.2% of the population in 2012 and over 50% of children under age one, and are projected to constitute the majority by 2044.
A 2017 Gallup poll concluded that 4.5% of adult Americans identified as LGBT with 5.1% of women identifying as LGBT, compared with 3.9% of men. The highest percentage came from the District of Columbia (10%), while the lowest state was North Dakota at 1.7%.
The most widely taught foreign languages in the United States, in terms of enrollment numbers from kindergarten through university undergraduate studies, are: Spanish (around 7.2 million students), French (1.5 million), and German (500,000). Other commonly taught languages (with 100,000 to 250,000 learners) include Latin, Japanese, ASL, Italian, and Chinese. 18% of all Americans claim to speak at least one language in addition to English.
Languages spoken at home by more than 1 million persons in the U.S. (2016)[fn 12]
In a 2013 survey, 56% of Americans said that religion played a "very important role in their lives", a far higher figure than that of any other wealthy nation. 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.
As with other Western countries, the U.S. is becoming less religious. Irreligion is growing rapidly among Americans under 30. Polls show that overall American confidence in organized religion has been declining since the mid to late 1980s, and that younger Americans, in particular, are becoming increasingly irreligious. According to a 2012 study, the Protestant share of the U.S. population had dropped to 48%, thus ending its status as religious category of the majority for the first time. Americans with no religion have 1.7 children compared to 2.2 among Christians. The unaffiliated are less likely to get married with 37% marrying compared to 52% of Christians.
As of 2007, 58% of Americans age 18 and over were married, 6% were widowed, 10% were divorced, and 25% had never been married. Women now work mostly outside the home and receive a majority of bachelor's degrees.
The United States has a life expectancy of 79.8 years at birth, up from 75.2 years in 1990. Life expectancy ranged from a high of 81.3 years in Hawaii to a low of 73.4 years in American Samoa. The infant mortality rate of 6.17 per thousand places the United States 56th-lowest out of 224 countries.
Increasing obesity in the United States and health improvements elsewhere contributed to lowering the country's rank in life expectancy from 11th in the world in 1987, to 42nd in 2007. Obesity rates have more than doubled in the last 30 years, are the highest in the industrialized world, and are among the highest anywhere. Approximately one-third of the adult population is obese and an additional third is overweight. Obesity-related type 2 diabetes is considered epidemic by health care professionals.
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 European Union and Switzerland together contributed to five. Since 1966, more Americans have received the Nobel Prize 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. The U.S. health-care system far outspends any other nation, measured in both per capita spending and percentage of GDP.
Health-care coverage in the United States is a combination of public and private efforts and is not universal. In 2014, 13.4% of the population did not carry health insurance. The subject of uninsured and underinsured Americans is a major political issue. In 2006, Massachusetts became the first state to mandate universal health insurance.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 effect are issues of controversy.
The University of Virginia, founded by Thomas Jefferson in 1819, is one of the many public universities in the United States. Universal government-funded education exists in the United States, while there are also many privately funded institutions.
The United States has many competitive private and public institutions of higher education. The majority of the world's top universities listed by different ranking organizations are in the U.S. There are also local community 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. The basic literacy rate is approximately 99%. The United Nations assigns the United States an Education Index of 0.97, tying it for 12th in the world.
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. As of 2018, student loan debt exceeded 1.5 trillion dollars, more than Americans owe on credit cards.
The state governments are structured in roughly similar fashion; Nebraska uniquely has a unicameral legislature. 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; the first ten 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) in a decision handed down by Chief Justice John Marshall.
The United States is a federal republic of 50 states, a federal district, five territories and several uninhabited island possessions. The states and territories are the principal administrative districts in the country. These are divided into subdivisions of counties and independent cities. The District of Columbia is a federal district that contains the capital of the United States, Washington DC. The states and the District of Columbia choose the President of the United States. Each state has presidential electors equal to the number of their Representatives and Senators in Congress; the District of Columbia has three (because of the 23rd Amendment).Territories of the United States such as Puerto Rico do not have presidential electors, and so people in those territories cannot vote for the president.
Congressional Districts are reapportioned among the states following each decennial Census of Population. Each state then draws single-member districts to conform with the census apportionment. The total number of voting Representatives is 435. There are also 6 non-voting representatives who represent the District of Columbia and the five major U.S. territories.
The United States also observes tribal sovereignty of the American Indian nations to a limited degree, as it does with the states' sovereignty. American Indians are U.S. citizens and tribal lands are subject to the jurisdiction of the U.S. Congress and the federal courts. Like the states they have a great deal of autonomy, but also like the states, tribes are not allowed to make war, engage in their own foreign relations, or print and issue currency.
Citizenship is granted at birth in all states, the District of Columbia, and all major U.S. territories except American Samoa.
Parties and elections
Congressional leadership meeting with President Obama in 2011.
On October 25, 2017, Vice President Mike Pence announced at a In Defense of Christians annual dinner meeting in Washington that the United States would stop funding United Nations relief efforts, cases tackling the persecution of Christians in the Middle East, but insisted that the U.S. would instead help and aid Christians directly through the United States Agency for International Development. Pence said that he will be visiting the Middle East in December and will meet with Israeli Prime Minister Benjamin Netanyahu and Palestinian President Mahmoud Abbas to discuss peace agreements.
U.S. federal debt held by the public as a percentage of GDP, from 1790 to 2013.
Taxes in the United States are levied at the federal, state, and local government levels. These include taxes on income, payroll, property, sales, imports, estates and gifts, as well as various fees. Taxation in the United States is based on citizenship, not residency. Both non-resident citizens and Green Card holders living abroad are taxed on their income irrespective of where they live or where there income is earned. It is the only country in the world, other than Eritrea, to do so.
In 2010 taxes collected by federal, state and municipal governments amounted to 24.8% of GDP. 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%). Based on CBO estimates, under 2013 tax law the top 1% will be paying the highest average tax rates since 1979, while other income groups will remain at historic lows.
U.S. taxation has historically been generally progressive, especially the federal income taxes, though by most measures it became noticeably less progressive after 1980. It has sometimes been described as among the most progressive in the developed world, but this characterization is controversial. The highest 10% of income earners pay a majority of federal taxes, and about half of all taxes. Payroll taxes for Social Security are a flat regressive tax, with no tax charged on income above $118,500 (for 2015 and 2016) and no tax at all paid on unearned income from things such as stocks and capital gains. The historic reasoning for the regressive nature of the payroll tax is that entitlement programs have not been viewed as welfare transfers. However, according to the Congressional Budget Office the net effect of Social Security is that the benefit to tax ratio ranges from roughly 70% for the top earnings quintile to about 170% for the lowest earning quintile, making the system progressive.
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. 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. The incidence of corporate income tax has been a matter of considerable ongoing controversy for decades. 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.
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%).
The military budget of the United States in 2011 was more than $700 billion, 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. U.S. defense spending as a percentage of GDP ranked 23rd globally in 2012 according to the CIA. 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.
US global military presence.
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. The last American troops serving in Iraq departed in December 2011; 4,484 service members were killed during the Iraq War. Approximately 90,000 U.S. troops were serving in Afghanistan in April 2012; by November 8, 2013 2,285 had been killed during the War in Afghanistan.
In 2015, there were 15,696 murders which was 1,532 more than in 2014, a 10.8% increase, the largest since 1971. The murder rate in 2015 was 4.9 per 100,000 people. In 2016 the murder rate increased by 8.6%, with 17,250 murders that year. The national clearance rate for homicides in 2015 was 64.1%, compared to 90% in 1965. 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. In 2001–2, the United States had above-average levels of violent crime and particularly high levels of gun violence compared to other developed nations. A cross-sectional analysis of the World Health Organization Mortality Database from 2010 showed that United States "homicide rates were 7.0 times higher than in other high-income countries, driven by a gun homicide rate that was 25.2 times higher."Gun ownership rights continue to be the subject of contentious political debate.
From 1980 through 2008 males represented 77% of homicide victims and 90% of offenders. Blacks committed 52.5% of all homicides during that span, at a rate almost eight times that of whites ("whites" includes most Hispanics), and were victimized at a rate six times that of whites. Most homicides were intraracial, with 93% of black victims killed by blacks and 84% of white victims killed by whites. In 2012, Louisiana had the highest rate of murder and non-negligent manslaughter in the U.S., and New Hampshire the lowest. The FBI's Uniform Crime Reports estimates that there were 3,246 violent and property crimes per 100,000 residents in 2012, for a total of over 9 million total crimes.
Capital punishment is sanctioned in the United States for certain federal and military crimes, and used in 31 states. 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. Meanwhile, several states have either abolished or struck down death penalty laws. In 2015, the country had the fifth-highest number of executions in the world, following China, Iran, Pakistan and Saudi Arabia.
The United States has the highest documented incarceration rate and largest prison population in the world. At the start of 2008, more than 2.3 million people were incarcerated, more than one in every 100 adults. In December 2012, the combined U.S. adult correctional systems supervised about 6,937,600 offenders. About 1 in every 35 adult residents in the United States was under some form of correctional supervision in December 2012, the lowest rate observed since 1997. The prison population has quadrupled since 1980, and state and local spending on prisons and jails has grown three times as much as that spent on public education during the same period. However, the imprisonment rate for all prisoners sentenced to more than a year in state or federal facilities is 478 per 100,000 in 2013 and the rate for pre-trial/remand prisoners is 153 per 100,000 residents in 2012. The country's high rate of incarceration is largely due to changes in sentencing guidelines and drug policies. According to the Federal Bureau of Prisons, the majority of inmates held in federal prisons are convicted of drug offenses. The privatization of prisons and prison services which began in the 1980s has been a subject of debate. In 2013, Louisiana had the highest incarceration rate (1,082 per 100,000 people), and Maine the lowest (285 per 100,000 people). Among the U.S. territories, the highest incarceration rate was in the U.S. Virgin Islands (542 per 100,000 people) and the lowest was in Puerto Rico (313 per 100,000 people).
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%. The number of employees at all levels of government outnumber those in manufacturing by 1.7 to 1. While its economy has reached a postindustrial level of development and its service sector constitutes 67.8% of GDP, the United States remains an industrial power. The leading business field by gross business receipts is wholesale and retail trade; by net income it is manufacturing. 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.
Consumer spending comprises 68% of the U.S. economy in 2015. 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. The World Bank ranks the United States first in the ease of hiring and firing workers. The United States is ranked among the top three in the Global Competitiveness Report as well. It has a smaller welfare state and redistributes less income through government action than European nations tend to.
The United States is the only advanced economy that does not guarantee its workers paid vacation 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 Guinea, Suriname and Liberia. While federal law does not require sick leave, it is a common benefit for government workers and full-time employees at corporations. 74% of full-time American workers get paid sick leave, according to the Bureau of Labor Statistics, although only 24% of part-time workers get the same benefits. In 2009, the United States had the third-highest workforce productivity per person in the world, behind Luxembourg and Norway. It was fourth in productivity per hour, behind those two countries and the Netherlands.
The United States has been a leader in technological innovation since the late 19th century and scientific research since the mid-20th century. Methods for producing interchangeable parts were developed by the U.S. War Department by the Federal Armories during the first half of the 19th century. This technology, along with the establishment of a machine tool industry, enabled the U.S. to have large-scale manufacturing of sewing machines, bicycles and other items in the late 19th century and became known as the American system of manufacturing. Factory electrification in the early 20th century and introduction of the assembly line and other labor-saving techniques created the system called mass production.
These advancements then lead to greater personalization of technology for individual use. As of 2013, 83.8% of American households owned at least one computer, and 73.3% had high-speed Internet service. 91% of Americans also own a mobile phone as of May 2013. The United States ranks highly with regard to freedom of use of the internet.
In the 21st century, approximately two-thirds of research and development funding comes from the private sector. The United States leads the world in scientific research papers and impact factor.
After years of stagnant growth, in 2016, according to the Census, median household income reached a record high after two consecutive years of record growth, although income inequality remains at record highs with top fifth of earners taking home more than half of all overall income. There has been a widening gap between productivity and median incomes since the 1970s. However, the gap between total compensation and productivity is not as wide because of increased employee benefits such as health insurance. 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 significantly affected income inequality, leaving the United States with one of the widest income distributions among OECD nations. According to a 2018 study by the OECD, the United States has much higher income inequality and a larger percentage of low-income workers than almost any other developed nation. This is largely because at-risk workers get almost no government support and are further set back by a very weak collective bargaining system. The top 1 percent of income-earners accounted for 52 percent of the income gains from 2009 to 2015, where income is defined as market income excluding government transfers, The extent and relevance of income inequality is a matter of debate.
Wealth, like income and taxes, is highly concentrated; the richest 10% of the adult population possess 72% of the country's household wealth, while the bottom half claim only 2%. According to a September 2017 report by the Federal Reserve, the top 1% controlled 38.6% of the country's wealth in 2016. 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. Since peaking in the second quarter of 2007, household wealth was down $14 trillion, but has since increased $14 trillion over 2006 levels. At the end of 2014, household debt amounted to $11.8 trillion, down from $13.8 trillion at the end of 2008.
There were about 578,424 sheltered and unsheltered homeless persons in the U.S. in January 2014, with almost two-thirds staying in an emergency shelter or transitional housing program. 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 were not chronic. According to a 2014 report by the Census Bureau, one in five young adults lives in poverty, up from one in seven in 1980. As of September 2017, 40 million people, roughly 12.7% of the U.S. population, were living in poverty, with 18.5 million of those living in deep poverty (a family income below one-half of the poverty threshold). In 2016, 13.3 million children were living in poverty, which made up 32.6% of the impoverished population.
Personal transportation is dominated by automobiles, which operate on a network of 4 million miles (6.4 million kilometers) of public roads, including one of the world's longest highway systems at 57,000 mi (91,700 km). The world's second-largest automobile market, the United States has the highest rate of per-capita vehicle ownership in the world, with 765 vehicles per 1,000 Americans (1996). About 40% of personal vehicles are vans, SUVs, or light trucks. The average American adult (accounting for all drivers and non-drivers) spends 55 minutes driving every day, traveling 29 miles (47 km). In 2017, there were 255,009,283 motor vehicles—including cars, vans, buses, freight, and other trucks, but excluding motorcycles and other two-wheelers—or 910 vehicles per 1,000 people.
The United States energy market is about 29,000 terawatt hours per year.Energy consumption per capita is 7.8 tons (7076 kg) 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. The United States is the world's largest consumer of petroleum. The United States has 27% of global coal reserves. It is the world's largest producer of natural gas and crude oil.
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.
Water supply and sanitation
Issues that affect water supply in the United States include droughts in the West, water scarcity, pollution, a backlog of investment, concerns about the affordability of water for the poorest, and a rapidly retiring workforce. Increased variability and intensity of rainfall as a result of climate change is expected to produce both more severe droughts and flooding, with potentially serious consequences for water supply and for pollution from combined sewer overflows.[fn 15]
American children of many ethnic backgrounds celebrate noisily in a 1902 Puck cartoon.
Core American culture was established by Protestant British colonists and shaped by the frontier 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. 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%.
The American Dream, or the perception that Americans enjoy high social mobility, plays a key role in attracting immigrants. Whether this perception is realistic has been a topic of debate. While mainstream culture holds that the United States is a classless society, scholars identify significant differences between the country's social classes, affecting socialization, language, and values. Americans' self-images, social viewpoints, and cultural expectations are associated with their occupations to an unusually close degree. While Americans tend greatly to value socioeconomic achievement, being ordinary or average is generally seen as a positive attribute.
Apple pie is a food commonly associated with American cuisine.
Mainstream American cuisine is similar to that in other Western countries. Wheat is the primary cereal grain with about three-quarters of grain products made of wheat flour and many dishes use indigenous ingredients, such as turkey, venison, potatoes, sweet potatoes, corn, squash, and maple syrup which were consumed by Native Americans and early European settlers. These homegrown foods are part of a shared national menu on one of America's most popular holidays; Thanksgiving, when some Americans make traditional foods to celebrate the occasion.
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. Americans drink three times as much coffee as tea. Marketing by U.S. industries is largely responsible for making orange juice and milk ubiquitous breakfast beverages.
American eating habits owe a great deal to that of their British culinary roots with some variations. Although American lands could grow newer vegetables that Britain could not, most colonists would not eat these new foods until accepted by Europeans. Over time American foods changed to a point that food critic, John L. Hess stated in 1972: "Our founding fathers were as far superior to our present political leaders in the quality of their food as they were in the quality of their prose and intelligence".
The American fast food industry, the world's largest, pioneered the drive-through format in the 1940s. Fast food consumption has sparked health concerns. During the 1980s and 1990s, Americans' caloric intake rose 24%; frequent dining at fast food outlets is associated with what public health officials call the American "obesity epidemic". Highly sweetened soft drinks are widely popular, and sugared beverages account for nine percent of American caloric intake.
Although 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 Cowell and John Cage created a distinctive American approach to classical composition. Aaron Copland and George Gershwin developed a new synthesis of popular and classical music.
Hollywood, a northern district of Los Angeles, California, is one of the leaders in motion picture production. 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, although in the 21st century an increasing number of films are not made there, and film companies have been subject to the forces of globalization.
In 1998, the number of U.S. commercial radio stations had grown to 4,793 AM stations and 5,662 FM stations. In addition, there are 1,460 public radio stations. Most of these stations are run by universities and public authorities for educational purposes and are financed by public or private funds, subscriptions, and corporate underwriting. Much public-radio broadcasting is supplied by NPR (formerly National Public Radio). NPR was incorporated in February 1970 under the Public Broadcasting Act of 1967; its television counterpart, PBS, was also created by the same legislation. (NPR and PBS are operated separately from each other.) As of September 30, 2014, there are 15,433 licensed full-power radio stations in the U.S. according to the U.S. Federal Communications Commission (FCC).
Well-known newspapers include The Wall Street Journal, The New York Times, and USA Today. Although the cost of publishing has increased over the years, the price of newspapers has generally remained low, forcing newspapers to rely more on advertising revenue and on articles provided by a major wire service, such as the Associated Press or Reuters, for their national and world coverage. With very few exceptions, all the newspapers in the U.S. are privately owned, either by large chains such as Gannett or McClatchy, which own dozens or even hundreds of newspapers; by small chains that own a handful of papers; or in a situation that is increasingly rare, by individuals or families. Major cities often have "alternative weeklies" to complement the mainstream daily papers, for example, New York City's The Village Voice or Los Angeles' LA Weekly, to name two of the best-known. Major cities may also support a local business journal, trade papers relating to local industries, and papers for local ethnic and social groups. Early versions of the American newspaper comic strip and the American comic book began appearing in the 19th century. In 1938, Superman, the comic book superhero of DC Comics, developed into an American icon. Aside from web portals and search engines, the most popular websites are Facebook, YouTube, Wikipedia, Yahoo!, eBay, Amazon, and Twitter.
More than 800 publications are produced in Spanish, the second most commonly used language in the United States behind English.
^In five territories, English as well as one or more indigenous languages are official: Spanish in Puerto Rico, Samoan in American Samoa, Chamorro in both Guam and the Northern Mariana Islands. Carolinian is also an official language in the Northern Mariana Islands.
^ abThe Encyclopædia Britannica lists China as the world's third-largest country (after Russia and Canada) with a total area of 9,572,900 sq km, and the United States as fourth-largest at 9,526,468 sq km. The figure for the United States is less than in the CIA World Factbook because it excludes coastal and territorial waters.
The CIA World Factbook lists the United States as the third-largest country (after Russia and Canada) with total area of 9,833,517 sq km, and China as fourth-largest at 9,596,960 sq km. This figure for the United States is greater than in the Encyclopædia Britannica because it includes coastal and territorial waters.
^Spain sent several expeditions to Alaska to assert its long-held claim over the Pacific Northwest, which dated back to the 16th century. During the decade 1785–1795 British merchants, encouraged by Sir Joseph Banks and supported by their government, made a sustained attempt to develop this trade despite Spain's claims and navigation rights. The endeavors of these merchants did not last long in the face of Spain's opposition. The challenge was also opposed by a Japan holding obdurately to national seclusion.
^On the evening of February 13, while anchored in Kealakekua Bay after their return, one of only two long boats was stolen. The Hawaiians had begun to openly challenge the foreigners. In retaliation, Cook tried to take the aliʻi nui of the island of Hawaii, Kalaniʻōpuʻu as ransom for the boats.
The following morning of February 14, 1779 Cook and his men went directly to Kalaniʻōpuʻu's enclosure where the monarch was still sleeping. One of ruler's wives, Kānekapōlei pleaded with them to stop. Cook's men and the Marines were confronted on the beach by thousands of Native Hawaiians. Cook tried to move the elderly man but he refused. As the townspeople began to surrounding them, Cook and his men raised their guns. Two chiefs and the monarch's wife shielded Kalaniʻōpuʻu as Cook tried to force him to his feet. The crowd became hostile and Kanaʻina (one of the monarch's attendants) approached Cook, who reacted by striking him with the broad side of his sword. Kanaʻina instantly grabbed Cook and lifted him off his feet. Kanaʻina released Cook, who fell to the ground as another attendant, Nuaa fatally stabbed Cook to death.
^Fertility is also a factor; in 2010 the average Hispanic 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).Minorities (as defined by the Census Bureau as all those beside non-Hispanic, non-multiracial whites) constituted 36.3% of the population in 2010 (this is nearly 40% in 2015), and over 50% of children under age one, and are projected to constitute the majority by 2042. 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. The Hispanic birth rate plummeted 25% between 2006 and 2013 while the rate for non-Hispanics decreased just 5%.
^Source: 2015 American Community Survey, U.S. Census Bureau. Most respondents who speak a language other than English at home also report speaking English "well" or "very well" For the language groups listed above, the strongest English-language proficiency is among speakers of German (96% report that they speak English "well" or "very well"), followed by speakers of French (93.5%), Tagalog (92.8%), Spanish (74.1%), Korean (71.5%), Chinese (70.4%), and Vietnamese (66.9%).
^In January 2015, U.S. federal government debt held by the public was approximately $13 trillion, or about 72% of U.S. GDP. Intra-governmental holdings stood at $5 trillion, giving a combined total debt of $18.080 trillion. By 2012, total federal debt had surpassed 100% of U.S. GDP. The U.S. has a credit rating of AA+ from Standard & Poor's, AAA from Fitch, and AAA from Moody's.
^Droughts are likely to particularly affect the 66 percent of Americans whose communities depend on surface water. As for drinking water quality, there are concerns about disinfection by-products, lead, perchlorates and pharmaceutical substances, but generally drinking water quality in the U.S. is good.
^"uscode.house.gov". Public Law 105-225. uscode.house.gov. August 12, 1999. pp. 112 Stat. 1263. Retrieved September 10, 2017. Section 304. "The composition by John Philip Sousa entitled "The Stars and Stripes Forever" is the national march."
^"China". CIA World Factbook. CIA. Retrieved June 10, 2016.
^UN Environment World Conservation Monitoring Centre. "Megadiverse Countries definition". Biodiversity A−Z. UN WCMC. Retrieved September 11, 2017. 17 countries which have been identified as the most biodiversity-rich countries of the world, with a particular focus on endemic biodiversity.
^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... ...This latest find comes in a letter that Stephen Moylan, Esq., wrote to Col. Joseph Reed from the Continental Army Headquarters in Cambridge, Mass., during the Siege of Boston. The two men lived with Washington in Cambridge, with Reed serving as Washington's favorite military secretary and Moylan fulfilling the role during Reed's absence." Christian Science Monitor (Boston, MA).
^Touba, Mariam (November 5, 2014) Who Coined the Phrase 'United States of America'? You May Never Guess "Here, on January 2, 1776, seven months before the Declaration of Independence and a week before the publication of Paine's Common Sense, Stephen Moylan, an acting secretary to General George Washington, spells it out, 'I should like vastly to go with full and ample powers from the United States of America to Spain' to seek foreign assistance for the cause." New-York Historical Society Museum & Library
^G. H. Emerson, The Universalist Quarterly and General Review, Vol. 28 (Jan. 1891), p. 49, quoted in Zimmer, Benjamin (November 24, 2005). "Life in These, Uh, This United States". University of Pennsylvania. Retrieved January 5, 2013.
^Wilson, Kenneth G. (1993). The Columbia Guide to Standard American English. New York: Columbia University Press, pp. 27–28. ISBN 0-231-06989-8.
^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
^Paige Meltzer, "The Pulse and Conscience of America" The General Federation and Women's Citizenship, 1945–1960," Frontiers: A Journal of Women Studies (2009), Vol. 30 Issue 3, pp. 52–76.
^James Timberlake, Prohibition and the Progressive Movement, 1900–1920 (Harvard UP, 1963)
^George B. Tindall, "Business Progressivism: Southern Politics in the Twenties," South Atlantic Quarterly 62 (Winter 1963): 92–106.
^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.
^Voris, Jacqueline Van (1996). Carrie Chapman Catt: A Public Life. Women and Peace Series. New York City: Feminist Press at CUNY. p. vii. ISBN 978-1-55861-139-9. 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.
^Yaron Matras; Peter Bakker (2003). The Mixed Language Debate: Theoretical and Empirical Advances. Walter de Gruyter. p. 301. ISBN 978-3-11-017776-3. in the Northern Marianas, Chamarro, Carolinian ( = the minority language of a group of Carolinian immigrants), and English received the status of co-official languages in 1985(Rodriguez-Ponga 1995:24–28).
^Strauss, Lilo T.; et al. (November 24, 2006). "Abortion Surveillance—United States, 2003". MMWR. Centers for Disease Control and Prevention, National Center for Chronic Disease Prevention and Health Promotion, Division of Reproductive Health. Retrieved June 17, 2007.
^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.
^Isabelle Joumard; Mauro Pisu; Debbie Bloch (2012). "Tackling income inequality The role of taxes and transfers"(PDF). OECD Journal: Economic Studies: 27. Retrieved September 24, 2015. Various studies have compared the progressivity of tax systems of European countries with that of the United States (see for instance Prasad and Deng, 2009; Piketty and Saez, 2007; Joumard, 2001). Though they use different definitions, methods and databases, they reach the same conclusion: the US tax system is more progressive than those of the continental European countries.
^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.
^Hounshell, David A. (1984), From the American System to Mass Production, 1800-1932: The Development of Manufacturing Technology in the United States, Baltimore, Maryland: Johns Hopkins University Press, ISBN 978-0-8018-2975-8, LCCN83016269
^Development, Organization for Economic Cooperation and; Staff, Organization for Economic Cooperation Development (Oecd) (March 18, 2014). Household Income. Society at a Glance 2014: OECD Social Indicators. Society at a Glance. doi:10.1787/soc_glance-2014-en. ISBN 9789264200722. Retrieved May 29, 2014.
^"Daily Passenger Travel". 2001 National Household Travel Survey. U.S. Dept. of Transportation, Bureau of Transportation Statistics. Archived from the original on May 13, 2005. Retrieved August 15, 2007.
^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.
^ abcAdams, J.Q.; Strother-Adams, Pearlie (2001). Dealing with Diversity. Chicago: Kendall/Hunt. ISBN 0-7872-8145-X.
^Thompson, William; Hickey, Joseph (2005). Society in Focus. Boston: Pearson. ISBN 0-205-41365-X.
^Fiorina, Morris P.; Peterson, Paul E. (2000). The New American Democracy. London: Longman, p. 97. ISBN 0-321-07058-5.
^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.
^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.
Acharya, Viral V.; Cooley, Thomas F.; Richardson, Matthew P.; Walter, Ingo (2010). Regulating Wall Street: The Dodd-Frank Act and the New Architecture of Global Finance. Wiley. p. 592. ISBN 978-0-470-76877-8.
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