American History - Cold War Beginnings and the Civil Rights Movement (1945-1964)

Following World War II, the United States emerged as one of the two dominant superpowers. The U.S. Senate, on December 4, 1945, approved U.S. participation in the United Nations (UN), which marked a turn away from the traditional isolationism of the U.S. and toward more international involvement. The post-war era in the United States was defined internationally by the beginning of the Cold War, in which the United States and the Soviet Union attempted to expand their influence at the expense of the other, checked by each side's massive nuclear arsenal and the doctrine of mutual assured destruction. The result was a series of conflicts during this period including the Korean War and the tense nuclear showdown of the Cuban Missile Crisis. Within the United States, the Cold War prompted concerns about Communist influence, and also resulted in government efforts to encourage math and science toward efforts like the space race.

In the decades after the Second World War, the United States became a dominant global influence in economic, political, military, cultural and technological affairs. Following the collapse of the Soviet Union, it stands today as the sole superpower. The power of the United States is nonetheless limited by international agreements and the realities of political, military and economic constraints. At the center of middle-class culture since the 1950s has been a growing obsession with consumer goods.

John F. Kennedy was elected President in 1960. Known for his charisma, he was the only Catholic to ever be President. The Kennedys brought a new life and vigor to the atmosphere of the White House. During his time in office, the Cold War reached its height with the Cuban Missile Crisis in 1962. He was assassinated in Dallas, Texas, on November 22, 1963.

Meanwhile, the American people completed their great migration from the farms into the cities, and experienced a period of sustained economic expansion. At the same time, institutionalized racism across the United States, but especially in the American South, was increasingly challenged by the growing Civil Rights movement and African American leaders such as Martin Luther King, Jr. During the 1960s, the Jim Crow laws that legalized racial segregation between Whites and Blacks came to an end.

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