America First Committee, founded in September 1940, was the most powerful isolationist group in America before the United States entered World War II. It had over 800,000 members, who wanted to keep America neutral. It tried to influence public opinion through publications and speeches. America First disagreed with another powerful group, the Committee to Defend America by Aiding the Allies. Both groups wanted to build American defenses and keep America out of the war. But the Committee to Defend America argued that the best way to remain neutral was to aid Britain. America First thought it more important to stay out of the war than to assure a British victory. America First was dissolved four days after the Japanese attacked Pearl Harbor on Dec. 7, 1941.
