Paul Russell is Professor in Philosophy at the University of British Columbia and Lund University. His publications include Freedom and Moral Sentiment: Hume's Way of Naturalizing Responsibility (Oxford University Press, 1995); The Riddle of Hume's Treatise: Skepticism, Naturalism, and Irreligion (Oxford University Press, 2008); and The Limits of Free Will (Oxford University Press, 2017).