Christopher Macleod is Lecturer in Political Philosophy at the University of Lancaster. His current research focuses on Mill's theoretical philosophy and his theory of normativity. He is the author of "Mill's Antirealism" (Philosophical Quarterly, 2016), "Mill, Intuitions, and Normativity" (Utilitas, 2013) and the entry on J.S. Mill for the Stanford Encyclopedia of Philosophy (2016).

Dale E. Miller is Professor of Philosophy at Old Dominion University in the US. He is the author of J. S. Mill: Moral, Social and Political Thought (Polity, 2010), and the co-editor of several collections: The Cambridge Companion to Utilitarianism ( with Ben Eggleston, 2014); John Stuart Mill and the Art of Life (with Ben Eggleston and David Weinstein, 2011); and Morality, Rules and Consequences (with Brad Hooker and Elinor Mason, 2000).