David Keyt is Research Professor at the Center for the Philosophy of Freedom at the University of Arizona and Professor Emeritus of Philosophy at the University of Washington, his home base from 1957 until 2013. He is the author of Nature and Justice: Studies in the Ethical and Political Philosophy of Plato and Aristotle (Peeters, 2017) and Aristotle: Politics V and VI, Translation and Commentary (Clarendon Press, 1999). With Fred D. Miller, Jr. he coedited Freedom, Reason, and the Polis: Essays in Ancient Greek Political Philosophy (Cambridge, 2007) and A Companion to Aristotle's Politics (Blackwell, 1991). Among his recent work is "Aristotelian Freedom" in The Oxford Handbook of Freedom (Oxford, 2018) and an intellectual memoir entitled "A Life in the Academy" in Reason and Analysis in Ancient Greek Philosophy: Essays in Honor of David Keyt (Springer, 2013).

Christopher Shields is Distinguished University Professor and Henry E. Allison Chair at the University of California San Diego.  He is an Honorary Research Fellow of Lady Margaret Hall, University of Oxford; before moving to UCSD, he held positions as  Shuster Professor at the University of Notre Dame and Professor of Classical Philosophy at the University of Oxford. He has held the Tang Chun-I Visiting Professorship at the Chinese University of Hong Kong, the Collins Visiting Professor at the University of St. Louis, and a Senior Fellowship at TOPOI, the Humboldt University of Berlin.  He has held visiting professorships at Cornell University, Stanford University, Yale University, and The University of Arizona.  He is the author of Order in Multiplicity: Homonymy in the Philosophy of Aristotle (Oxford University Press: 1999), Classical Philosophy: A Contemporary Introduction (Routledge: 2003), Aristotle (Routledge: 2007), Ancient Philosophy: A Contemporary Introduction (Routledge: 2011), with Robert Pasnau, The Philosophy of Thomas Aquinas (Westview: 2003; 2nd rev. ed. Oxford University Press: 2015), and Aristotle's De Anima, Translated with Introduction and Commentary (Oxford University Press: 2016).  He is the editor of The Blackwell Guide to Ancient Philosophy (Blackwell: 2002), The Oxford Handbook of Aristotle (Oxford University Press: 2012), with David Brink and Susan Sauvé Meyer, Virtue, Happiness, and Knowledge (Oxford University Press: 2018), and, with António Pedro Mesquita, Simon Noriega-Olmos, Revisiting Aristotle's Fragments (De Gruyter: 2020).