Keith Ansell Pearson is professor of philosophy and director of graduate research at the University of Warwick. His books include An Introduction to Nietzsche as Political Thinker: The Perfect Nihilist and Nietzsche Contra Rousseau.Simon Critchley is a best-selling author and the Hans Jonas Professor of Philosophy at the New School for Social Research. His many books include The Book of Dead Philosophers, Bowie, and Tragedy, the Greeks, and Us.