Was American isolation caused by World War 1?

American isolationism was not directly caused by World War I, but the war did contribute to its rise in the 1920s and 1930s. After the war, many Americans grew disillusioned with international involvement, particularly due to the heavy costs and the perceived futility of the conflict. The desire to focus on domestic issues and the belief that the U.S. should avoid entanglements in foreign affairs led to a strong isolationist sentiment during the interwar period. This mindset ultimately influenced U.S. foreign policy until the attack on Pearl Harbor in 1941.