James G. Lennox is professor emeritus of History and Philosophy of Science at the University of Pittsburgh and a leading expert in Aristotle's philosophy of science and his biological writings. During 1983-84, he was a junior fellow at the Center for Hellenic Studies in Washington, D.C.; in 1987, a fellow at Clare Hall, Cambridge University; and in 1994, a visiting lecturer in philosophy at Oxford University. He has received research grants from the National Science Foundation and the National Endowment for the Humanities.  His research and publications focus on the relationship between philosophy and the life sciences, with particular emphasis on ancient Greece and the 19th and 20th centuries. 

Professor Lennox is the author of Aristotle: On the Parts of Animals I-IV, a translation and commentary in the Clarendon Aristotle Series (Oxford University Press 2001) and Aristotle’s Philosophy of Biology: Studies in the Origins of Life Science in the Cambridge Studies in in Philosophy and Biology series (Cambridge University Press 2001). He has just published Aristotle on Inquiry: Erotetic Frameworks and Domain-Specific Norms (Cambridge University Press, 2021) and a chapter on The Cambridge Companion to Aristotle's Biology (2021). The book edited by him and Allan Gotthelf, titled Philosophical Issues in Aristotle's Biology (1987), was one of the great milestones of the so-called biological turn, the new hermeneutic paradigm of studying Aristotle's biology for the light it can shed on his philosophy (and vice versa) that has been influencing specialists ever since.

His current research interests include Ancient Greek philosophy and science, William Harvey, Darwin and Darwinism, philosophy of biology, scientific inquiry and explanation in historical context.