WORLD HISTORY

Detailed explanation-1: -Although U.S. isolationism was not the only cause of WWII it was one of the main reasons for the start of the war because it allowed authoritarian rule to sweep the world with the weakened League of Nations, contributed to the worsening of the Great Depression, and made diplomatic resolve abroad impossible.

Detailed explanation-2: -The US was isolationist in the period leading up to World War II even while moving to become more involved once war broke out. It was the Japanese attack at Pearl Harbor that brought the US into the war. The US has been isolationist at other times, with the main example being the US neutrality during World War I.

Detailed explanation-3: -When World War I broke out in Europe in 1914, President Woodrow Wilson declared the United States neutral. This continued the government’s 19th century policy of isolationism – staying out of the affairs of other countries.

Detailed explanation-4: -However, the watershed regarding the history of U.S. foreign policy was the shift from isolationism to interventionism after World War II. The turning point was signaled by a series of military activities during and after WWII such as the involvement of the US in WWII and the US intervention in Vietnam.

Detailed explanation-5: -Most of the student-founders of the America First Committee and its military-age supporters joined the US military; the organization formally voted to disband on December 10, 1941. Only days after the United States entered World War II, no mainstream isolationist movement remained.