 He also happens to be a returning debater. Hi, Jeffrey. Good to have you here. Hi, great to be back. And arguing that pleasure is the key to happiness, we welcome Roger Crisp, who's a professor of moral philosophy at the University of Oxford, where he's also a Uero fellow and a tutor in the philosophy at St. Ann's College. Roger is the author of several books, including Sacrifice Regained, Morality and Self-Interest in British Moral Philosophy from Hobbes to Bentham. Roger, thank you for being here today.