What events and developments between 1945 and 1952 generated massive anxieties and challenges to American postwar confidence despite the country's record economic prosperity

Most of the anxieties during the period between 1945 and 1952 are related to communism, the Soviet Union, and the Cold War.

Explanation:

After World War II, two countries dominated world affairs: The United States, which favored capitalism and a market economy, and the Soviet Union, which favored communism, and a planned economy. These two countries had been allies during World War II, but once the war ended, they became enemies.

The U.S. had spectacular economic growth during the 1940s and 1950s, however, the Soviet Union also progressed, and it managed to detonate its own atomic bomb in 1949. This caused great anxiety in the U.S. because it meant that the enemy now had a lethal weapon that could cause deadly damage.

Another anxiety factor was the first proxy war between the Soviet Union and the United States: the Korean War, which lasted from 1950 to 1953.

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