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Unit 8
10–17% of examAfter World War II the United States became a superpower locked in a Cold War with the Soviet Union, which shaped everything from wars in Korea and Vietnam to fears of communism at home. A booming economy built the suburbs and a large middle class, while the civil rights movement, and the movements it inspired, pushed the country to live up to its promise of equality. By the 1970s Vietnam, Watergate and economic trouble had shaken Americans' trust in government and fed a growing conservative movement.
Longer videos that cover the whole unit. Good for a first pass or a final review.
In 1945 the U.S. came out of World War II as the world's richest and most powerful country, facing a rival superpower in the Soviet Union. That rivalry, a booming economy and unfinished promises of equality set up the big themes of 1945–1980.
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The U.S. tried to contain the spread of communism with the Truman Doctrine (1947), the Marshall Plan, the NATO alliance (1949) and a nuclear arms race with the Soviet Union. The Cold War turned hot in Korea (1950–1953) and nearly went nuclear in the Cuban Missile Crisis (1962), before tensions eased in the 1970s under détente.
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Fear of communist spies led to a Second Red Scare: loyalty checks for federal workers, House Un-American Activities Committee (HUAC) hearings, the Hollywood blacklist and Senator Joseph McCarthy's reckless accusations in the early 1950s. Some real Soviet spying did happen, as in the Rosenberg case, but many innocent people lost their jobs, and Americans debated how to balance security with civil liberties.
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Pent-up savings, the GI Bill and Cold War defense spending fueled a long postwar boom that grew the middle class. Millions moved to new suburbs like Levittown and to the Sun Belt, linked by the Interstate Highway Act (1956), though discrimination such as redlining kept many Black families out of the new suburbs.
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Television, suburban family life and consumer goods spread a common mass culture in the 1950s, a decade often remembered for conformity and rising church membership. Critics pushed back, from Beat writers like Jack Kerouac to rock 'n' roll and books questioning suburban life.
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Building on gains made during the war, activists won key victories: Truman desegregated the armed forces in 1948, and the Supreme Court struck down school segregation in Brown v. Board of Education (1954). Rosa Parks and Martin Luther King Jr. helped lead the Montgomery Bus Boycott (1955–1956), while many white Southerners resisted, as in the 1957 crisis at Little Rock.
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The Cold War spread worldwide as new nations in Asia, Africa and the Middle East won independence from European empires and both superpowers competed for their support. The U.S. backed anti-communist governments, sometimes through secret CIA operations as in Iran (1953) and Guatemala (1954), and Americans debated nuclear weapons and the growing 'military-industrial complex' that Eisenhower warned about.
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To stop communism from spreading in Southeast Asia, the U.S. deepened its role in Vietnam, and after the Gulf of Tonkin Resolution (1964) President Johnson sent more than half a million troops. The 1968 Tet Offensive and a growing antiwar movement turned many Americans against the war. Under Nixon's 'Vietnamization' U.S. troops came home, the last combat forces left in 1973, and Congress passed the War Powers Resolution to limit a president's power to wage war.
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Lyndon B. Johnson's Great Society used federal power to fight poverty and widen opportunity, creating Medicare, Medicaid, federal aid to schools and a War on Poverty, and the Immigration Act of 1965 ended national-origin quotas. Meanwhile, the Supreme Court under Chief Justice Earl Warren expanded individual rights in cases like Gideon v. Wainwright (1963) and Miranda v. Arizona (1966).
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Sit-ins, Freedom Rides, the 1963 March on Washington and the Selma marches pushed Congress to pass the Civil Rights Act of 1964 and the Voting Rights Act of 1965. Frustrated by slow change and violent resistance, some activists turned to Black Power and the ideas of Malcolm X, and the movement debated nonviolence versus self-defense.
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Inspired by the Black freedom struggle, other groups organized for equal rights: feminists like Betty Friedan and the National Organization for Women, farmworkers led by César Chávez and Dolores Huerta, the American Indian Movement, and gay rights activists after the 1969 Stonewall uprising. Some goals were won, but the Equal Rights Amendment passed Congress in 1972 and then fell short of ratification.
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Many college-age baby boomers joined a New Left that protested the Vietnam War, racism and campus rules, led by groups like Students for a Democratic Society. A broader counterculture rejected mainstream values through music, dress, drug use and new attitudes about sex, which many older Americans saw as a threat to traditional morals.
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Pollution disasters like the 1969 Cuyahoga River fire and Rachel Carson's book Silent Spring helped spark an environmental movement that led to the first Earth Day and the Environmental Protection Agency (both 1970) and laws like the Clean Air Act and Endangered Species Act. Oil shocks in 1973 and 1979, tied to Middle East politics, exposed U.S. dependence on foreign oil and pushed leaders to try to create a national energy policy.
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In the 1970s Americans' trust in government fell after Vietnam, the Watergate scandal that led Nixon to resign in 1974, 'stagflation' and the Iran hostage crisis (1979–1981). At the same time, a growing conservative movement, including newly active evangelical Christians, pushed back against liberal court decisions and cultural change, and fights over issues like abortion, busing and the ERA divided the country.
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This skill topic asks you to explain what changed and what stayed the same from 1945 to 1980, such as how far civil rights advanced, or how New Deal–style liberalism grew in the 1960s and then lost support by the late 1970s.
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