"Western philosophy is now two and a half millennia old, but much of it came in just two staccato bursts, each lasting only about 150 years. In his landmark survey of Western philosophy from the Greeks to the Renaissance, The Dream of Reason, Anthony Gottlieb documented the first burst, which came in the Athens of Socrates, Plato, and Aristotle. Now, in his sequel, The Dream of Enlightenment, Gottlieb expertly navigates a second great explosion of...