The first of three Cambridge-based schools on the list, Harvard boasts the world’s top departments in accounting, biology, earth and marine sciences, economics, education, law, medicine, pharmacy, politics, and psychology, QS reports. Its endowment, the largest in the world for a university, is bigger than the GDP of nearly half the world’s countries. There are 62 living billionaires who call Harvard their alma mater, more than any other school on earth.