What does "American Exceptionalism" refer to in the context of imperialism?

In the context of American imperialism, "American Exceptionalism" refers to the belief that the United States has a unique purpose and destiny to spread democracy and civilization around the world. This concept emerged from the idea that the U.S. was distinct from other nations due to its democratic foundations and values of liberty. Proponents of American Exceptionalism argued that the U.S. had a moral obligation to intervene in other countries to promote democracy and improve societal conditions, often justifying imperialistic actions under the guise of benevolence and progress. This belief played a significant role in justifying various interventions and expansions, as it suggested that American leadership and influence were beneficial for both the U.S. and the countries it engaged with.