Why did America go back to isolationism after world war 1?

America did not go back to isolationism after World War I. In fact, the United States played a much more active role in international affairs after the war than it had before. For example, the United States joined the League of Nations, an international organization that was created to promote peace and cooperation among nations. The United States also signed several treaties with other countries, such as the Kellogg-Briand Pact, which outlawed war as a means of settling disputes.

However, it is true that the United States did not immediately join the League of Nations after World War I. There was a great deal of debate in the United States about whether or not to join the League. Some people argued that the United States should join the League in order to help prevent future wars. Others argued that the United States should not join the League because it would entangle the United States in European affairs. In the end, the United States Senate rejected the League of Nations treaty, and the United States did not join the League.

Despite the fact that the United States did not join the League of Nations, the United States did play an important role in international affairs after World War I. The United States provided financial aid to Europe to help rebuild after the war. The United States also participated in several international conferences, such as the Paris Peace Conference, which established the terms of the peace settlement after World War I.