This volume analyses in depth the reception of early Greek philosophy in the Epicurean tradition and provides for the first time in scholarship a comprehensive edition, with translation and commentary, of all the Herculanean testimonia to the Presocratics. Among the most significant scientific outcomes, it provides elements for the attribution of an earlier date to the attested tradition of Xenophanes’ scepticism; a complete reconstruction of the Epicurean reception of Democritus; a new reconstruction of the testimonia to Nausiphanes’ concept of physiologia, Anaxagoras’ physics and theology, and Empedocles’ epistemology; new texts for better comparing the doxographical sections of Philodemus’ On Piety with those of Cicero’s On the Nature of the Gods, which update Hermann Diels’ treatment of this subject in his Doxographi Graeci.