Top 10 US Presidents Who Changed the Course of History

These US leaders altered the course of history in major ways. Welcome to WatchMojo, and today we’re counting down the American presidents who, for better or for worse, changed history the most. Our countdown of US Presidents who changed the course of history includes Harry S. Truman, John F. Kennedy, Abraham Lincoln, and more! Which other presidents do you think should be on this list, and why? Let us know in the comments.