James Buchanan, Gerald Ford, James Garfield, Warren Harding, Andrew Jackson, Andrew Johnson, William McKinley, James Monroe, James Polk, Franklin Roosevelt, Theodore Roosevelt, William Howard Taft, Harry Truman, George Washington
Who they are: The king of all secret societies, the Freemasonry has been nabbing major members since its inception hundreds of years ago. If that sounds vague, it's because it's not entirely clear just when this ritualized organization came to be. It doesn't help that the lodges, where membership is granted and rituals are held, often act independently of one another. As such, little is known about their practices, aside from the fact that members consider Freemasonry to be "a beautiful system of morality."