Isolationism

Isolationism in general is a national foreign policy of detachment from other nations, as opposed to interventionism?. Most often it refers to the foreign policy of the United States of America from the formation of the Monroe Doctrine to about World War II. During this time, U.S. policymakers refrained from actively engaging with the affairs of other countries, to the point that U.S. entry into both World Wars occurred long after each war began.

Following World War II, American policymakers took an active interest in foreign affairs, becoming heavily interventionist?.