Answer:
the Great Depression.
Explanation:
The experience of World War one was had a deep negative impact on the public of the United States of America, who considered it a war in Europe. They found that American involvement was an economy where large profits of war goods derive the nation into the war and have to pay by the lives of American citizens. In World War second, where the American society was recovering from the Blow of the Great Depression, people were not ready for any other hard time experience. They were trying that foreign policy should not surpass domestic issues.