31 May 1940|
|Died||11 August 2007
Agios Minas, Greece
Education and career 
He joined the faculty of the Philosophy Department at University of California, Berkeley as an Assistant Professor (1971) and quickly rose to the status of full Professor. From 1976 to 1991, he was a professor at the Princeton University Philosophy Department.
He returned to Europe in 1991 and took the Chair in the History of Philosophy at the University of Oxford. In 1997-8 he returned to Berkeley to lecture on free will as the 84th visiting Sather Professor of Classical Literature; the resulting book was published posthumously. He retired from Oxford in 2005 and lived in Athens, Greece until his death in a drowning accident in 2007.
He was a Member of the Göttingen Academy of Sciences, a Fellow of the British Academy, and a Member of the American Academy of Arts and Sciences.
Selected works 
- Pradikation und Existenzaussage: Platons Gebrauch von "...ist..." und "...ist nicht..." im Sophistes, 1967
- Die Stoische Logik, 1974
- Galen. Three Treatises on the Nature of Science (co-edited with Richard Walzer), 1985
- Essays in Ancient Philosophy, 1987
- Aristoteles 'Metaphysik Z': Text, Übersetzung und Kommentar, 2 vols (co-edited with Günther Patzig), 1988
- The Original Sceptics: A Controversy (co-edited with Myles Burnyeat), 1997
- Rationality in Greek Thought (co-edited with Gisela Striker), 1999
- Pagan Monotheism in Late Antiquity (co-edited with Polymnia Athanassiadi), 2001
- Aristotle’s Metaphysics Book Lambda (co-edited with David Charles), 2001
- A Free Will: origins of the notion in ancient thought (edited by A. A. Long with a foreword by David Sedley), 2011