Long before the Enlightenment sowed the seeds of disbelief in a deeply Christian Europe, atheism was a matter of serious public debate in the Greek world. But history is written by those who prevail, and the Age of Faith mostly suppressed the lively, free-thinking voices of antiquity. The A G Leventis Professor of Greek Culture at Cambridge brings to life the fascinating ideas of Diagoras of Melos, perhaps the first self-professed atheist; Democritus, the first materialist; and Epicurus and his followers. He shows how the early Christians came to define themselves against atheism, and so suppress the philosophy of disbelief.