Emeritus Professor of Ancient Philosophy
Fellow of St John's College
Ancient political thought, philosophy of Cicero.
Recent topics include: Presocratic philosophy, Plato, ancient political philosophy (Aristotle, Cicero), later Platonism.
Plato: Political philosophy (Oxford 2006)
The Cambridge History of Greek and Roman Political Thought, ed. with Christopher Rowe (Cambridge 2000)
Saving the City (Routledge 1999)
The Cambridge History of Hellenistic Philosophy, ed. with Keimpe Algra, Jonathan Barnes & Jaap Mansfeld (Cambridge 1999)
The Stoic Idea of the City (Cambridge 1991; expanded edition Chicago 1999)
The Presocratic Philosophers, with G.S. Kirk and J.E. Raven (2nd edn., Cambridge 1983)
Doubt & Dogmatism, ed. with M.F. Burnyeat and J. Barnes (Oxford 1980)
An Essay on Anaxagoras (Cambridge 1980)