Emeritus Fellow since 2010
- Senior Research Fellow, All Souls College (from 1984 to 2010)
- Research Fellow, All Souls College (from 1981 to 1984)
- Junior Research Fellow, All Souls College (from 1974 to 1981)
- Prize Fellow, All Souls College (from 1967 to 1974)
- Harkness Fellow, Columbia and Harvard Universities, USA (from 1964 to 1967)
- Undergraduate, Balliol College, Oxford (from 1961 to 1967)
- Problems of personal identity, rationality, and ethics
- On What Matters, 2 vols. (Oxford: Oxford University Press, 2011 and 2013).
- Reasons and Persons (Oxford: Clarendon Press, 1984).
Other professional memberships and roles
- Visiting Professor of Philosophy, New York University, Harvard University, and Rutgers University