Arthur Herman has now written the definitive sequel to his New York Times bestseller, How the Scots Invented the Modern World, and extends the themes of the book—which sold half a million copies worldwide—back to the ancient Greeks and forward to the age of the Internet. The Cave and the Light is a magisterial account of how the two greatest thinkers of the ancient world, Plato and Aristotle, laid the foundations of Western culture—and how their...