David Sedley is Laurence Professor of Ancient Philosophy at the University of Cambridge, where he is also a Fellow of Christ's College. He is the author of The Hellenistic Philosophers (1987, with A. A. Long), Lucretius and the Transformation of Greek Wisdom (1998), Plato's Cratylus (2003), The Midwife of Platonism. Text and Subtext in Plato's Theaetetus (2004), and Creationism and its Critics in Antiquity (2007), based on his 2004 Sather Lectures. He edited Oxford Studies in Ancient Philosophy from 1998 to 2007. He is a Fellow of the British Academy, and a Foreign Honorary Member of the Ameri...