Final answer:
The primary objective of U.S. foreign policy during the 1930's was isolationism, aimed at avoiding involvement in international conflicts, particularly in Europe, while managing limited engagement in Latin American affairs to protect American interests.
Step-by-step explanation:
During the 1930's, a primary objective of United States foreign policy was isolationism, which meant avoiding entanglements in foreign conflicts and steering clear of alliances that could draw the country into another global conflict. While there were overarching objectives of U.S. foreign policy that included protection of U.S. and its citizens, maintaining access to resources and markets, preserving a balance of power, and protecting human rights and democracy, the 1930s sharpened the focus on isolation. The Great Depression had a significant influence on U.S. foreign policy during this time, as the country was more concerned with its own economic recovery than with foreign affairs. Despite its isolationist stance, the U.S. did find itself involved in Latin American affairs where it sought to protect its interests, but engagement with Europe was minimal, evident through legislative acts such as the Neutrality Acts, designed to prevent U.S. involvement in overseas wars.