Oxford Studies in Ancient Philosophy is a volume of original articles on all aspects of ancient philosophy. The articles may be of substantial length, and include critical notices of major books. OSAP is now published twice yearly, in both hardback and paperback. In this volume, articles range from Heraclitus to Proclus, with several on each of Aristotle and Plato. Editor: David Sedley, Laurence Professor of Ancient Philosophy, University of Cambridge.