Homer’s epic poems of human striving, journeying, and passion were ancient Greece’s only “sacred texts,” but no ancient Greek thought twice about questioning or mocking his stories of the gods. Priests were functionaries rather than sources of moral or cosmological wisdom. The absence of centralized religious authority made for an extraordinary variety of perspectives on sacred matters, from the devotional to the atheos, or “godless.” Whitmarsh explores this kaleidoscopic range of ideas about the gods, focusing on the colorful individuals who challenged their existence. Among these were some of the greatest ancient poets and philosophers and writers, as well as the less well known: Diagoras of Melos, perhaps the first self-professed atheist; Democritus, the first materialist; Socrates, executed for rejecting the gods of the Athenian state; Epicurus and his followers, who thought gods could not intervene in human affairs; the brilliantly mischievous satirist Lucian of Samosata.