What factors led to the growing support for imperialism in the US?

The growing support for Imperialism in the U.S. was driven by a combination of economic interests, nationalistic fervor, and a belief in cultural superiority. The desire for new markets for American goods and access to raw materials fueled expansionist policies. Additionally, the influence of social Darwinism promoted the idea that the U.S. had a duty to civilize "lesser" nations, while the competition with European powers heightened national pride and the push for overseas territories.