Johanna Oksala is senior lecturer in philosophy at the University of Dundee and a member of the Centre of Excellence in Political Thought and Conceptual Chance at the University of Jyväskylä. She is the author of Foucault on Freedom.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.