Multiple choice One reason people supported Imperialism was identifying with the British colonial rule support for self-rule Belief US would bring democracy and civilization to others belief it would keep US out of conflict with other countries Reveal answer Fill a bubble to check yourself C Correct answer Explanation A common justification for American imperialism was the belief in the 'white man's burden' or the idea that the U.S. had a moral duty to spread democracy and Western civilization to other parts of the world.