David T. Runia is Master of Queen?s College and Professorial Fellow in the School of Historical and Philosophical Studies at the University of Melbourne. He is a recognised expert in ancient and patristic philosophy, with a particular focus on the Jewish philosopher Philo of Alexandria and the Platonist tradition. He is also engaged on a long-term research project on the doxographical sources for our knowledge of early Greek philosophy (together with Prof Jaap Mansfeld, Utrecht). After studying Classics, History and Philosophy at the University of Melbourne, he completed his dissertation at the Free University, Amsterdam in 1983. He held Professorial posts at the Universities of Utrecht and Leiden in the Netherlands, before moving back to Australia in 2002. In 1986?87 he was a member of the School of Historical Studies at The Institute for Advanced Study in Princeton.