This job discusses root causes for America's sense of isolationism in the
late 1930s and includes references.
American sentiment had long been in favor of isolationism from the strife and turmoil that so often defined European politics. This had first been codified in the Monroe Doctrine, which demanded that European nations avoid tangling with the United States in the Western Hemisphere. Until the First World War, most Americans expected that they would reciprocate by staying out of European ...
Reasons for favoring isolationism are traced.