The United States enjoys two things more than just about anything else: doing war and making presidential doctrines about doing war. If you include “domestic” conflicts like the genocide of Native Americans, the United States has been at war for almost its entire existence, and of its 44 presidents, at least a quarter of them have issued some kind of doctrine or another that is noted as such today. That’s including the Roosevelt Corollary, which technically was Teddy Roosevelt’s revision of the Monroe Doctrine, but it was a pretty huge revision (from “nobody messes with the Western Hemisphere” to “we’re going to mess with the Western Hemisphere”), so I think it warrants inclusion. On the other hand I’m not including the Polk Doctrine, which was just a restatement of the Monroe Doctrine, and anyway we’re getting into the weeds a bit, aren’t we?
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