Final answer:
During WWI and WWII, the United States had a debate between isolationism and interventionism. Isolationists aimed to avoid foreign conflicts and promote neutrality, while interventionists sought to support allies and uphold democratic values. The United States shifted from isolationism to interventionism during WWII.
Step-by-step explanation:
During WWI and WWII, there was a debate between isolationism and interventionism in the United States. Isolationist believed in avoiding foreign conflicts and promoting neutrality, while interventionists believed in supporting allies and upholding democratic values to prevent aggression. In the case of WWI, the United States initially tried to remain neutral but eventually joined the war. After WWI, there was a return to isolationism, but it shifted to interventionism during WWII, as the United States became one of the superpowers and military leaders of the world.