Plato (c. 427-347 b.c.) founded the Academy in Athens, the prototype of all Western universities, and wrote more than twenty philosophical dialogues. Thomas Kjeller Johansen studied philosophy and classics at Trinity College, Cambridge. He is now University Lecturer in Ancient Philosophy at Oxford University and Tutorial Fellow of Brasenose College, Oxford. His publications include Plato's Natural Philosophy. A Study of the Timaeus-Critias (Cambridge 2004).