DANIEL STAR is Associate Professor of Philosophy at Boston University. He is the author of Knowing Better: Virtue, Deliberation, and Normative Ethics (2015) in addition to numerous journal articles, and most recently edited the Oxford Handbook of Reasons and Normativity (2018).

ROGER CRISP is Professor of Moral Philosophy at the University of Oxford, Uehiro Fellow and Tutor in Philosophy at St Anne's College, Oxford, and Professorial Fellow at the Australian Catholic University. He is the author of Mill on Utilitarianism (1997), Reasons and the Good (2008), and The Cosmos of Duty (2015). He is also editor of the Oxford Handbook of the History of Ethics (2013) and has translated Aristotle's Nicomachean Ethics.