What was one of the major ideologies driving U.S. foreign policy during its imperialistic expansion?

Manifest Destiny was a significant ideology that influenced U.S. foreign policy during its era of imperialistic expansion, particularly in the 19th century. The belief in Manifest Destiny was rooted in the notion that the United States was destined to expand its territory across the North American continent, spreading its values and institutions. This ideology was more than just a perspective on land acquisition; it encapsulated a belief in American exceptionalism and the perceived superiority of U.S. democracy and culture. Proponents believed that this expansion was both justified and inevitable, which rationalized actions such as the annexation of Texas and the acquisition of territories following the Mexican-American War.

As the U.S. moved into the late 19th and early 20th centuries, this belief evolved and reinforced imperialist actions beyond continental borders, leading to interventions in places like Hawaii, Guam, the Philippines, and Puerto Rico. The sense of a divine right to expand not only drove territorial acquisition but also generated debates about the responsibilities of the U.S. as an imperial power, particularly in the context of civilizing missions and bringing democracy to "backward" nations.

This philosophy stands in contrast to the other choices. Self-determination for colonized nations highlights a desire for independence that is often