is Professor of Philosophy at the University of Cambridge. Until recently he was Edna J. Koury Distinguished Professor of Philosophy at the University of North Carolina, Chapel Hill, and from 1969 to 1990 he was a Fellow and Tutor at Pembroke College, Oxford. His books include Ruling Passions (1998), Truth (co-edited with Keith Simmons, 1999), Think (1999), Being Good (2001), Lust (2004).