Isolation to containment analyze the America foreign policy from 1919 to 1949?

From 1919 to 1949, American foreign policy evolved from isolationism to a strategy of containment in response to global events. Initially, following World War I, the U.S. adopted an isolationist stance, avoiding entanglement in European affairs and focusing on domestic issues. However, the rise of totalitarian regimes in the 1930s and the onset of World War II shifted this approach, leading to active involvement in global conflicts. After the war, the emergence of the Soviet Union as a superpower prompted the U.S. to adopt a policy of containment, aimed at preventing the spread of communism, which shaped international relations during the Cold War.