David O. Brink is Distinguished Professor of Philosophy at the University of California, San Diego, He is the author of Moral Realism and the Foundations of Ethics (1989), Perfectionism and the Common Good: Themes in the Philosophy of T. H. Green (2003), and Mill's Progessive Principles (2013). Susan Sauvé Meyer is Professor and Chair of Philosophy at the University of Pennsylvania. Her publications include Aristotle on Moral Responsibility (1993, 2011), Ancient Ethics (2008), and a translation of Books 1 and 2 of Plato's Laws, with commentary. Christopher Shields is Shuster Professor of Philosophy at the University of Notre Dame. His books include Order in Multiplicity: Homonymy in the Philosophy of Aristotle (1999) and Aristotle's De Anima, Translated with Introduction and Commentary (2016).