Kevin Timpe holds the W. H. Jellema Chair in Christian Philosophy at Calvin College. He has published a number of books on free will, including Free Will: Sourcehood and Its Alternatives, Second Edition (2013, Free Will in Philosophical Theology (2013), and Free Will and Theism: Connections, Contingencies, and Concerns (2016).

Meghan Griffith is Associate Professor of Philosophy at Davidson College. She is the author of Free Will: The Basics (Routledge, 2013) and a number of articles centering on human agency.

Neil Levy is professor of philosophy at Macquarie University, Sydney, and a senior researcher at the Uehiro Centre for Practical Ethics, University of Oxford. He is the author of 7 books, including, most recently, Consciousness and Moral Responsibility (2014). He has published very widely on free will, moral responsibility, philosophy of mind, applied ethics and other topics.