How did ethnocentrism influence American foreign policy from 1865 to 1970?

Ethnocentrism significantly influenced American foreign policy from 1865 to 1970 by fostering a belief in the superiority of American values and culture, which justified expansionist and interventionist policies. This mindset often led to the promotion of "American exceptionalism," where the U.S. sought to spread democracy and capitalism, sometimes disregarding the cultures and governance of other nations. Events such as the Spanish-American War and the Cold War reflect this tendency, as the U.S. intervened in various regions under the premise of civilizing or protecting populations. Overall, ethnocentrism shaped perceptions and actions that prioritized American interests and ideologies on the global stage.