Peter Singer has been described as the world's most influential living philosopher.  He is professor of bioethics at Princeton University, and the author of many books, including Animal Liberation, Practical Ethics, One World, The Life You Can Save, and The Most Good You Can Do.

Coleman Hughes is a fellow at the Manhattan Institute and a contributing editor at City Journal. His writing has been featured in the New York Times, the Wall Street Journal, National Review, Quillette, The City Journal and The Spectator. He has appeared on many podcasts, including The Rubin Report, Making Sense with Sam Harris, and Real Time with Bill Mahr.