Hugh LaFollette is Marie and Leslie E. Cole Chair in Ethics, University of South Florida, St. Petersburg. He is editor-in-chief of the nine volume International Encyclopedia of Ethics (2013), and author of The Practice of Ethics (Blackwell, 2007) and Personal Relationships: Love, Identity, and Morality (Blackwell, 1995). He is co-author of Brute Science: The Dilemmas of Animal Experimentation (1996), and editor of several other volumes, including Ethics in Practice: An Anthology (third edition, Blackwell, 2007).

Ingmar Persson is Professor of Practical Philosophy, University of Gothenburg, and Distinguished Research Fellow, Oxford Uehiro Centre for Practical Ethics, University of Oxford. His publications include The Retreat of Reason (2005) and, together with Julian Savulescu, Unfit for the Future: The Need for Moral Enhancement (2012). He is now finishing From Morality to the End of Reason: An Essay on Rights, Reasons and Responsibility.