The philosopher David Hume was born in Edinburgh, Scotland on April 26, 1711. Known for his re-thinking of causation, morality, and religion, Hume has left a lasting mark on history. James Madison, the "father" of the U.S. Constitution, drew heavily on Hume's writing, especially his "Idea of Perfect Commonwealth," which combated the belief at the time that a large country could not sustain a republican form of government. Hume's writing also influenced...