Much as we respect the ancient Greeks for their contributions to philosophy, politics, and art, their medical practices were no less revolutionary. In the 5th century BC, a Greek doctor put forward his clinical observations in a collection of case histories known as the Epidemics, and among his working principles was the famous maxim, "Do no harm." Upending our understanding of medical history, Robin Lane Fox suggests that the author in question was the father of medicine, Hippocrates himself. Reflecting on the development of scientific and rational thinking in Western culture, Lane Fox explores the consequences for Greek artists, dramatists, and historians.