AP US History study materials
AP US History study resources

AP US History key terms

AP US History · Get comfortable with the vocabulary.

Columbian Exchange

The transfer of plants, animals, people, and diseases between the Americas and Europe, Africa, and Asia after 1492; it reshaped diets and populations, and Eurasian germs killed most Native Americans.

Related: encomienda system, Middle Passage
encomienda system

Spanish colonial labor arrangement granting colonists the right to Native American labor and tribute; in practice it became forced labor, defended by missionaries as a means of Christianizing Indians.

Related: Columbian Exchange, Iroquois Confederacy
Iroquois Confederacy

A league of five later six Iroquoian nations in the Northeast, governing through a council, that played a central role in colonial diplomacy, the fur trade, and both sides' alliance calculations.

Related: Columbian Exchange
mercantilism

Economic doctrine holding that national power rests on accumulated wealth, so colonies should supply raw materials and buy the mother country's manufactures; it justified English laws restricting colonial trade.

Related: salutary neglect, Middle Passage
salutary neglect

Informal British practice before 1763 of loosely enforcing trade and colonial laws, letting colonies govern themselves; the resulting habits of self-rule made later imperial tightening feel like tyranny.

Related: mercantilism, Stamp Act
Bacon's Rebellion

A 1676 Virginia uprising of frontier settlers and indentured servants against Governor Berkeley's Indian policy and elite favoritism; planters afterward relied more heavily on enslaved Africans to avoid a united lower class.

Related: Middle Passage, salutary neglect
Middle Passage

The forced sea voyage carrying enslaved Africans across the Atlantic to the Americas; crowded ships and high mortality made it the deadliest leg of the triangular trade.

Related: Columbian Exchange, mercantilism
Stamp Act

A 1765 British law taxing printed paper such as newspapers, legal documents, and licenses in the colonies to raise revenue; it provoked the Stamp Act Congress and the cry of no taxation without representation.

Related: salutary neglect, Articles of Confederation
Articles of Confederation

The first U.S. constitution, in force 1781 to 1789, creating a loose league of states with a one-house Congress, no power to tax or regulate trade, and no executive; its weaknesses prompted the Constitutional Convention.

Related: Federalist Papers, Three-Fifths Compromise
Federalist Papers

Eighty-five essays by Hamilton, Madison, and Jay published in 1787 and 1788 urging ratification of the Constitution; they argued that separation of powers and a large republic would control faction.

Related: Articles of Confederation, Three-Fifths Compromise
Three-Fifths Compromise

Constitutional agreement counting three of every five enslaved people toward a state's population for representation and taxes, increasing slaveholding states' power in Congress without granting enslaved people any rights.

Related: Articles of Confederation, Missouri Compromise
Alien and Sedition Acts

Federalist laws of 1798 lengthening naturalization, permitting deportation of supposedly dangerous foreigners, and punishing criticism of the government; Republicans called them unconstitutional and answered with the Kentucky and Virginia Resolutions.

Related: Federalist Papers, Marbury v. Madison
Marbury v. Madison

An 1803 Supreme Court ruling that denied William Marbury his commission but declared courts may strike down acts of Congress violating the Constitution, establishing the principle of judicial review.

Related: Alien and Sedition Acts, Missouri Compromise
Missouri Compromise

An 1820 agreement admitting Missouri as a slave state and Maine as free, and barring slavery from the northern part of the Louisiana Purchase, temporarily quieting sectional conflict over slavery's expansion.

Related: Three-Fifths Compromise, Compromise of 1877
Monroe Doctrine

President Monroe's 1823 declaration that the Western Hemisphere was closed to new European colonization or intervention while the United States would stay out of European affairs; it became a cornerstone of foreign policy.

Related: Open Door policy
market revolution

The early nineteenth-century transformation of the economy through canals, railroads, factories, and commercial farming, which linked distant regions and drew workers into wage labor and cash exchange.

Related: Social Darwinism, Missouri Compromise
Seneca Falls Convention

An 1848 women's rights meeting in New York where Elizabeth Cady Stanton and others issued a Declaration of Sentiments demanding suffrage and equal legal standing for women.

Related: market revolution
Emancipation Proclamation

Lincoln's January 1, 1863 order freeing enslaved people only in rebelling states; it did not free everyone but made abolition a Union war aim and allowed Black men to enlist.

Related: black codes, sharecropping
black codes

Laws passed by southern legislatures after the Civil War restricting freedpeople's movement, labor contracts, and civil rights; their harshness pushed Radical Republicans toward a tougher Reconstruction policy.

Related: Emancipation Proclamation, Compromise of 1877
Compromise of 1877

The bargain settling the disputed 1876 election: Rutherford Hayes won the presidency in exchange for withdrawing federal troops from the South, effectively ending Reconstruction and leaving Black southerners unprotected.

Related: black codes, sharecropping
sharecropping

A labor system in which landless farmers, often freedpeople, worked a landowner's fields for a share of the crop, usually leaving them in debt and dependent on the planter.

Related: black codes, Jim Crow laws
Social Darwinism

The application of survival-of-the-fittest ideas to society, used by late nineteenth-century business leaders and critics of charity to justify inequality and oppose labor reform and government aid.

Related: Sherman Antitrust Act, Populist Party
Jim Crow laws

State and local statutes in the South requiring racial segregation in schools, transportation, and public spaces; upheld in Plessy v. Ferguson, they disfranchised and subordinated Black Americans until the 1960s.

Related: sharecropping, Great Migration
Populist Party

A farmers' party of the 1890s demanding free silver, government ownership of railroads, an income tax, and direct election of senators; it faded after 1896 but left lasting reform ideas.

Related: Sherman Antitrust Act, Social Darwinism
Sherman Antitrust Act

The first federal law banning monopolies and combinations in restraint of trade, passed in 1890; courts first used it against unions rather than trusts, and enforcement stayed weak until the Progressive era.

Related: Social Darwinism, Populist Party
Open Door policy

The 1899 American proposal that all nations trade equally in China and respect its territorial integrity; it protected U.S. commercial access without acquiring colonies and shaped Pacific policy.

Related: Monroe Doctrine, containment
New Deal

Franklin Roosevelt's programs of relief, recovery, and reform from 1933 to 1939, including Social Security, the Wagner Act, and banking regulation, which enlarged federal responsibility for the economy and welfare.

Related: Great Society, Great Migration
Harlem Renaissance

A 1920s flowering of African American literature, music, and art centered in Harlem that celebrated Black culture, challenged racist stereotypes, and drew white patrons and audiences.

Related: Great Migration, Jim Crow laws
Great Migration

The movement of millions of African Americans from the rural South to northern and western cities between roughly 1910 and 1970, seeking jobs and escaping Jim Crow, reshaping urban politics and culture.

Related: Harlem Renaissance, Jim Crow laws
containment

The Cold War strategy of blocking Soviet expansion through alliances, aid, and, where necessary, military force rather than rolling back existing communist states; it guided U.S. policy from Truman onward.

Related: Marshall Plan, Open Door policy
Marshall Plan

A U.S. program from 1948 to 1952 sending about thirteen billion dollars to rebuild Western European economies, aiming to prevent communist gains and open markets for American goods.

Related: containment, Reaganomics
Brown v. Board of Education

A unanimous 1954 Supreme Court decision holding that racially segregated public schools are inherently unequal, overturning separate-but-equal doctrine and energizing the civil rights movement.

Related: Jim Crow laws, Great Society
Great Society

Lyndon Johnson's 1960s legislation attacking poverty and racial injustice, including Medicare, Medicaid, Head Start, and the Civil Rights and Voting Rights Acts; it expanded federal social programs but met backlash over cost and scope.

Related: Brown v. Board of Education, New Deal
Reaganomics

President Reagan's approach of large tax cuts, reduced domestic spending, deregulation, and tight money to curb inflation; supporters credit renewed growth, while critics blame rising deficits and inequality.

Related: culture wars, globalization
USA PATRIOT Act

A law passed after the September 11 attacks expanding government surveillance, wiretapping, and detention powers; supporters called it necessary for security while critics warned it threatened civil liberties.

Related: culture wars
globalization

The growing worldwide integration of economies, communications, and cultures since the late twentieth century, driven by trade agreements, technology, and migration, and debated for its effects on jobs and sovereignty.

Related: Reaganomics
culture wars

Persistent American disputes since the 1980s over abortion, guns, religion in public life, gender, and sexuality, dividing voters along ideological and religious lines and shaping national elections.

Related: Reaganomics, USA PATRIOT Act