Reader in Philosophy at Royal Holloway, University of London, and Visiting Research Fellow at King's College London, where I work on the Ancient Commentators on Aristotle project. A member of Common Room at Wolfson College, Oxford. Author of The Art of Living (2003; 2nd edn 2009), Stoicism (2006), and Hellenistic Philosophy (2018); editor of The Stoic Handbook of the Stoic Tradition (2016).