Founded in 1908, Harvard is one of the most prestigious business schools in the world. Harvard emphasizes the case method in the classroom and students all over the planet study cases written by Harvard faculty. HBS offers dual degrees with several Harvard schools, including the law school, medical school, and Kennedy School of Government. The list of Harvard alums includes some of the most powerful people in America: Jamie Dimon, CEO of JPMorgan Chase; Michael Bloomberg, billionaire former mayor of New York City; George W. Bush, former U.S. president; Robert Kraft, owner of the New England Patriots; and Sheryl Sandberg, Facebook COO. Learn more here.