Isolationism in the U.S. post-1919 was driven by the harsh peace settlement on Germany, reluctance for international involvement, and a desire to stay clear of radicalism.
Isolationism in the U.S. after 1919 was influenced by several factors. Americans turned towards isolationism due to the harsh peace settlement imposed on Germany, their reluctance for involvement in other countries' issues, and the sentiment favoring avoiding radicalism by staying out of world affairs.
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