How did World War I contribute to the isolationists feeling the 1920s and 1930s?

World War I contributed to the isolationist sentiment in the 1920s and 1930s by disillusioning many Americans with international involvement and the consequences of global conflict. The immense loss of life and economic turmoil from the war led to a widespread belief that the U.S. should prioritize domestic issues over foreign entanglements. Additionally, the failure of the League of Nations and the post-war instability in Europe reinforced the idea that international cooperation was ineffective, solidifying a desire to avoid future military engagements. As a result, many Americans advocated for a return to isolationism during this period.