HiSET Social Studies study materials
HiSET Social Studies study resources

HiSET Social Studies key terms

HiSET Social Studies · Get comfortable with the vocabulary.

Popular sovereignty

The principle that political power comes from the consent of the people, who choose their rulers and shape their government. In U.S. history it also described letting settlers in a territory vote on whether to allow slavery.

Related: Social contract, Federalism
Social contract

The idea that people give up some freedom to a government in exchange for protection and order, and that rulers who break this bargain may be replaced. Associated with Locke and Rousseau.

Related: Popular sovereignty, Natural rights
Natural rights

Basic freedoms such as life, liberty, and property that Enlightenment thinkers argued belong to every person by birth, not by grant from a king or legislature.

Related: Social contract, Declaration of Independence
Federalism

A system that divides power between a central government and state or regional governments, each with its own authority. In the U.S., the Constitution lists powers for each level and shares others.

Related: Enumerated powers, Reserved powers, Supremacy Clause
Separation of powers

Dividing government authority among legislative, executive, and judicial branches so that no single branch holds all power, reducing the risk of tyranny.

Related: Checks and balances, Veto, Judicial review
Checks and balances

The overlapping powers that let each branch of government limit the others, such as the president vetoing laws or courts striking down unconstitutional acts.

Related: Separation of powers, Veto, Judicial review
Veto

The president's power to reject a bill passed by Congress. Congress can override a veto with a two-thirds vote in both the House and the Senate.

Related: Checks and balances, Separation of powers
Judicial review

The authority of courts to examine laws and government actions and declare them invalid if they conflict with the Constitution. Established in Marbury v. Madison (1803).

Related: Checks and balances, Supremacy Clause
Enumerated powers

Powers specifically listed in Article I, Section 8 of the U.S. Constitution as belonging to Congress, such as coining money, declaring war, and regulating interstate commerce.

Related: Elastic Clause, Reserved powers, Federalism
Reserved powers

Powers the Tenth Amendment keeps for the states or the people because the Constitution does not delegate them to the federal government, such as running elections and public schools.

Related: Federalism, Enumerated powers
Elastic Clause

The final clause of Article I, Section 8, letting Congress make laws "necessary and proper" to carry out its listed powers. It has been used to expand federal authority.

Related: Enumerated powers, Implied powers
Supremacy Clause

Article VI provision stating that the Constitution, federal laws, and treaties are the highest law of the land when state law conflicts with them.

Related: Federalism, Judicial review
Bill of Rights

The first ten amendments to the U.S. Constitution, ratified in 1791, protecting freedoms such as speech, religion, press, assembly, and fair treatment in criminal cases.

Related: Due process, Selective incorporation
Due process

The constitutional guarantee that government must follow fair, established legal procedures before depriving anyone of life, liberty, or property. Protected by the Fifth and Fourteenth Amendments.

Related: Bill of Rights, Selective incorporation
Selective incorporation

The process by which the Supreme Court has applied most Bill of Rights protections to state governments through the Fourteenth Amendment's due process clause, one case at a time.

Related: Due process, Bill of Rights
Declaration of Independence

The 1776 document in which the American colonies announced separation from Britain, listing grievances against the king and asserting natural rights and government by consent.

Related: Natural rights, Social contract
Articles of Confederation

The first U.S. national constitution, in force from 1781 to 1789. It created a weak central government with no power to tax or regulate commerce, which led to its replacement.

Related: Constitutional Convention, Federalist Papers
Federalist Papers

Essays by Hamilton, Madison, and Jay published in 1787–88 urging ratification of the Constitution, explaining arguments such as separation of powers and protection against faction.

Related: Articles of Confederation, Separation of powers
Constitutional Convention

The 1787 meeting in Philadelphia where delegates wrote the U.S. Constitution, resolving disputes through compromises over representation, slavery, and the power of the national government.

Related: Great Compromise, Three-Fifths Compromise
Great Compromise

The 1787 agreement creating a two-house Congress: the House apportioned by population and the Senate giving each state equal representation, settling large-state and small-state demands.

Related: Constitutional Convention, Three-Fifths Compromise
Three-Fifths Compromise

The 1787 agreement that each enslaved person would count as three-fifths of a person for both representation in the House and direct taxation, increasing slaveholding states' political power.

Related: Constitutional Convention, Great Compromise
Manifest Destiny

The nineteenth-century belief that the United States was destined to expand across North America, used to justify westward settlement and wars such as the Mexican-American War.

Related: Westward expansion, Mexican Cession
Reconstruction

The period after the Civil War (roughly 1865–1877) when the federal government rebuilt the South, added the Thirteenth, Fourteenth, and Fifteenth Amendments, and briefly protected Black civil rights.

Related: Fourteenth Amendment, Jim Crow laws
Fourteenth Amendment

The 1868 amendment granting citizenship to formerly enslaved people, guaranteeing equal protection and due process against the states, and providing the basis for many civil rights rulings.

Related: Reconstruction, Due process, Selective incorporation
Jim Crow laws

State and local laws in the post-Reconstruction South that enforced racial segregation in schools, transportation, and public places until the civil rights movement of the 1950s and 1960s.

Related: Reconstruction, Plessy v. Ferguson
Plessy v. Ferguson

The 1896 Supreme Court decision upholding racial segregation under the doctrine of "separate but equal," a ruling later overturned by Brown v. Board of Education in 1954.

Related: Jim Crow laws, Equal protection
Equal protection

The Fourteenth Amendment guarantee that no state may deny any person the same legal protection as others, the basis for striking down segregation and other discriminatory laws.

Related: Fourteenth Amendment, Plessy v. Ferguson
Industrial Revolution

The shift from hand production to machine manufacturing that began in Britain in the late 1700s and spread worldwide, transforming work, cities, and trade.

Related: Urbanization, Laissez-faire
Imperialism

The policy of one nation extending political, economic, or military control over another territory or people, a major force in world affairs in the late nineteenth and early twentieth centuries.

Related: Nationalism, Colonialism
Nationalism

Strong loyalty to and pride in one's nation, often tied to shared language or culture. It can unify countries or fuel conflict, as in the events leading to World War I.

Related: Imperialism, Treaty of Versailles
Treaty of Versailles

The 1919 agreement ending World War I, imposing reparations and territorial losses on Germany. Many historians link its harsh terms to later instability and the rise of Nazism.

Related: Nationalism, League of Nations
League of Nations

An international organization formed after World War I to keep peace through collective action. The U.S. never joined, and the League proved unable to stop aggression in the 1930s.

Related: Treaty of Versailles, United Nations
United Nations

An international organization founded in 1945 to maintain peace, promote human rights, and coordinate global cooperation. Its Security Council holds primary responsibility for peace and security.

Related: League of Nations
Cold War

The decades-long rivalry after World War II between the United States and the Soviet Union, marked by nuclear arms competition, proxy wars, and ideological conflict without direct large-scale combat.

Related: Containment, Marshall Plan
Containment

U.S. Cold War policy of limiting the spread of communism through economic aid, alliances, and military force, guiding actions such as the Marshall Plan and the Korean War.

Related: Cold War, Marshall Plan
Marshall Plan

A U.S. program begun in 1948 that gave billions in aid to rebuild Western European economies after World War II, aiming to stabilize them and resist communist influence.

Related: Cold War, Containment
Scarcity

The basic economic condition in which resources are limited while human wants are unlimited, forcing individuals and societies to make choices about how to use what is available.

Related: Opportunity cost, Supply and demand
Opportunity cost

The value of the next best alternative given up when a choice is made. It is the true cost of any decision, whether personal, business, or governmental.

Related: Scarcity, Trade-off
Supply and demand

The interaction between how much of a good producers offer at various prices and how much buyers want. Their balance sets market prices and quantities.

Related: Scarcity, Market economy
Market economy

An economic system in which private individuals and businesses own resources and make decisions based on prices and profit rather than government planning.

Related: Supply and demand, Laissez-faire
Laissez-faire

The belief that government should interfere as little as possible in the economy, letting markets and private enterprise operate freely.

Related: Market economy, Industrial Revolution
Fiscal policy

Government use of taxing and spending to influence the economy, such as cutting taxes or funding public works to stimulate growth during a downturn.

Related: Monetary policy, Federal Reserve
Monetary policy

Actions by a central bank to manage the money supply and interest rates in order to control inflation and support employment.

Related: Federal Reserve, Fiscal policy
Federal Reserve

The central bank of the United States, created in 1913. It sets monetary policy, supervises banks, and works to keep prices stable and employment high.

Related: Monetary policy, Fiscal policy
Urbanization

The growth of cities as people move from rural areas to urban ones, often driven by industrial jobs and accompanied by crowded housing and public health challenges.

Related: Industrial Revolution, Migration
Migration

The movement of people from one place to another, whether within a country or across borders, usually driven by economic opportunity, conflict, or environmental conditions.

Related: Urbanization, Push and pull factors
Push and pull factors

Conditions that drive people away from a place (push), such as war or poverty, and conditions that attract them to another (pull), such as jobs or safety.

Related: Migration
Primary source

An original document or object created during the period being studied, such as a letter, photograph, law, or diary. It offers direct evidence rather than later interpretation.

Related: Secondary source, Bias
Secondary source

A work that interprets or analyzes primary evidence after the fact, such as a textbook, biography, or documentary. It reflects the author's selection and judgment.

Related: Primary source, Bias
Bias

A slant or partiality in how information is selected or presented, which can distort a source's reliability. Historians check authorship, purpose, and audience to detect it.

Related: Primary source, Secondary source