1) The document traces the path of US foreign policy from isolationism after WWI to greater involvement in European affairs prior to entering WWII. It discusses the Neutrality Acts of the 1930s, America First movement, and debates around interventionism. 2) FDR pushed for aid to allies through Lend-Lease in 1941 to support defenses without direct military engagement. However, the US remained neutral until the Japanese attack on Pearl Harbor in December 1941 that provoked American entry to the war. 3) The document examines the shift in public opinion from non-intervention to accepting involvement as aggression and threats to international order spread during the late 1930s.