What was the primary focus of U.S. foreign policy in the early 20th century?

The primary focus of U.S. foreign policy in the early 20th century was expansion and imperialism. During this period, the United States shifted from a more isolationist stance to actively seeking to expand its influence across the globe. This is evident through various actions such as the acquisition of territories following the Spanish-American War in 1898, which included Puerto Rico, Guam, and the Philippines.

Moreover, the concept of Manifest Destiny, which had previously justified westward expansion across the North American continent, evolved into a belief in American exceptionalism and the desire to spread democracy and capitalism abroad. The U.S. engaged in interventions in Latin America, exemplified by the Roosevelt Corollary to the Monroe Doctrine, which allowed the U.S. to intervene in the affairs of Latin American countries. The establishment of economic interests and military presence in other territories was seen as a way to secure national interests and project power on the global stage.

This expansionist approach also facilitated the U.S. becoming a major player in international affairs as it sought to compete with European powers for influence and control, marking a significant departure from previously held isolationist policies.