Contents -- Preface -- 1 Superstitious Christians -- 2 Problems of Definition -- 3 Inventing Deisidaimonia: Theophrastus, Religious Etiquette, and Theological Optimism -- 4 Dealing with Disease: The Hippocratics and the Divine -- 5 Solidifying a New Sensibility: Plato and Aristotle on the Optimal Universe -- 6 Diodorus Siculus and the Failure of Philosophy -- 7 Cracks in the Philosophical System: Plutarch and the Philosophy of Demons -- 8 Galen on the Necessity of Nature and the Theology of Teleology -- 9 Roman Superstitio and Roman Power -- 10 Celsus and the Attack on Christianity -- 11 Origen and the Defense of Christianity -- 12 The Philosophers Turn: Philosophical Daimons in Late Antiquity -- 13 Turning the Tables: Eusebius, the "Triumph" of Christianity, and the Superstition of the Greeks -- Conclusion: The Rise and Fall of a Grand Optimal Illusion -- Notes -- Works Cited -- Index.