William W. Fortenbaugh, Ph.D. (1964) in Classics, University of Pennsylvania, is Professor Emeritus of Classics at Rutges University. He has published on various Peripatetic topics including Artistotle on Emotion (1975), founded Project Theophrastus and written Quellen zur Ethik Theophrasts (1984).Robert W. Sharples, Ph.D. (1978) in Classics, University of Cambridge, is Professor of Classics at University College London. He has published commentaries on works by Plato, Cicero, Alexander of Aphrodisias and Boethius. He has also published commentaries on Theophrastean biology (1995) and physics (1998).Michael G. Sollenberger, Ph.D. (1984) in Classics, Rutgers University, is Professor of Foreign Languages at Mount St. Mary's College, Maryland. He has published on the Peripatetic Lives of Diogenes Laertius and was the primary contributor to the vita section of the Theophrastean Source book (1992).