The correct answer to this open question is the following.
From 1914 to 1941, US foreign policy was influenced by isolationist sentiment. Analyze the causes for these beliefs, accounting for any significant changes from 1914 to 1941.
The causes that made the government of the United States to practice the foreign policy of neutrality or isolationism were that the US did not want to depend on anyone or to have debts with other countries that could create dependencies. The US did not want to pay for favors.
That is why US President Woodrow Wilson remained neutral at the beginning of World War I. But after the sinking of the Lusitania ship and the interception of the Zimmerman telegraph, he had to ask Congress for a declaration of war.
Something similar happened during World War II. President Franklin D. Roosevelt maintained the foreign policy of neutrality until the Japanese Air Force attacked the US Naval base at Pearl Harbor, Hawaii in December 1941.
