David Hume (1711–1776) is a towering and intriguing figure. He was the preeminent philosopher in what is now called the Scottish Enlightenment, a time that was “crowded with genius” and in a place regarded as the rebirth of the golden era of Athens. His writing displayed an astonishing range, addressing everything from metaphysics to politics, and in subject after subject he produced fresh, novel, and brilliant insights.