Henry E. Allison is Emeritus Professor of the University of California, San Diego, and Boston University. He is the author of many books, including Essays on Kant (OUP, 2012), Kant's Groundwork for the Metaphysics of Morals (OUP, 2011), and Custom and Reason in Hume (OUP, 2008), and over seventy-five scholarly articles and reviews.