The first step to carrying out this new isolationistic policy was for America to put a stop to the overwhelming foreign influence on the nation.
The first law that reflected this attitude was the Emergency Quota Act of 1921. It limited the immigration of European foreigners to America to 3 percent of the people of their nationality who had been living in the United States in 1910. Then three years later came the Immigration Act of 1924, which cut the quota for foreigners from 3 percent to 2 percent and shifted the national-origins base from the census of 1910 to that of 1890. This virtually stopped immigration to the United States in order to cut down on foreign influence. With immigration almost nonexistent, the United States sought to separate itself from foreign nations and their entanglements. To accomplish this, America did not join the League of Nations and refused to fully accept the Treaty of Versailles. Tariffs were yet another tool in isolating America from foreign countries. The trend of higher tariffs continued, making in incredibly difficult for any European products to enter the American
market. America was determined to stay peaceful no matter what. Partly due to the blame of World War Ion arms manufacturers and bankers, the United States passed a series of Neutrality Acts in the 1935, 1936, and 1937 forbidding the sale or transportation of munitions to belligerent nations, the sailing on a belligerent nation’s ship, or the making of loans to a belligerent nation. These acts were meant to act as further protection to keep America out of a conflict like World War I. Isolationism in the United States during the 1920s and 1930s was adopted primarily because fear of another war like that of World War I ran rampant. In the American people’s eyes, putting an end to foreign influence would put an end to foreign entanglements in war. Little did America know at that time, however, that this isolationism only allowed aggressors to commence the beginning of World War II.