Simon Keller is a philosopher who specializes in ethics, political philosophy, and the philosophy of mental health and disorder. He has written extensively about the moral and political dimensions of relationships, examining family relationships, friendships, erotic love, and patriotism. His work on mental health looks at the assumptions that lie behind our ways of dividing mental conditions into the healthy and the unhealthy, and the links between mental health and the living of a good human life. He is the author of The Limits of Loyalty (winner of the American Philosophical Association Book Prize) and Partiality, and a co-author of The Ethics of Patriotism: A Debate. He is Professor of Philosophy at Victoria University of Wellington, having worked previously at Boston University and University of Melbourne. He has held visiting fellowships at Harvard University, Rice University, and LMU Munich.