Why did most American favor a policy of isolationism?

Most Americans favored a policy of isolationism in the years following World War I due to a desire to avoid the conflicts and repercussions associated with foreign entanglements. The devastating impact of the war led to widespread disillusionment with international involvement, as many believed it had not resulted in lasting peace or stability. Additionally, economic concerns and the Great Depression heightened the focus on domestic issues, further entrenching the belief that America should prioritize its own interests over international obligations.