Who is the greatest president in the almost 250-year history of the United States? Obviously, potential answers to that are up for debate, as is that a loaded question. So, let’s turn to science.
A group of U.S. political science students and scholars known as the American Political Science Association wanted to know the answer to that question so they came up with a way to get one. They developed a systematic ranking scheme which polled 162 of its members who rated all the former U.S. presidents on their effectiveness and their foresight while in office. Based on their results, here are the 20 greatest U.S. presidents in American history: