The birth of the United States through a successful colonial revolution created a unique nation-state in which anti-imperialist sentiment existed from the nation’s founding. Three broad points are essential in understanding the relationship between anti-imperialism and U.S. foreign relations. First, the United States obviously has had more than its share of imperialist ventures over the course of its history. Perhaps the better way to address the matter is to remark on—at least in comparison to other major powers—how intense a commitment to anti-imperialism has remained among some quarters of the American public and government. Second, the strength of anti-imperialist sentiment has varied widely and often has depended upon domestic developments, such as the emergence of abolitionism before the Civil War or the changing nature of the Progressive movement following World War I. Third, anti-imperialist policy alternatives have enjoyed considerably more support in Congress than in the executive branch.