This 2002 book explores the origins of the Epicurean philosophical system in the fifth and fourth centuries BC.The Epicurean philosophical system has enjoyed much recent scrutiny, but the question of its philosophical ancestry remains largely neglected. This book traces its origins in the fifth-century BC atomist Democritus, in his fourth-century followers such as Anaxarchus and Pyrrho, and in Epicurus' disagreements with his own Democritean teacher Nausiphanes. The result is not only a fascinating reconstruction of a lost tradition, but also an important contribution to the philosophical interpretation of Epicureanism, bearing especially on its ideal of tranquillity and on the relation of ethics to physics.The Epicurean philosophical system has enjoyed much recent scrutiny, but the question of its philosophical ancestry remains largely neglected. This book traces its origins in the fifth-century BC atomist Democritus, in his fourth-century followers such as Anaxarchus and Pyrrho, and in Epicurus' disagreements with his own Democritean teacher Nausiphanes. The result is not only a fascinating reconstruction of a lost tradition, but also an important contribution to the philosophical interpretation of Epicureanism, bearing especially on its ideal of tranquillity and on the relation of ethics to physics.The Epicurean philosophical system has enjoyed much recent scrutiny, but the question of its philosophical ancestry remains largely neglected. This book traces its origins in the fifth-century BC atomist Democritus, in his fourth-century followers such as Anaxarchus and Pyrrho, and in Epicurus' disagreements with his own Democritean teacher Nausiphanes. The result is not only a fascinating reconstruction of a lost tradition, but also an important contribution to the philosophical interpretation of Epicureanism, bearing especially on its ideal of tranquillity and on the relation of ethics to physics.List of figures; Acknowledgements; List of abbreviations; Introduction:ls+