IAIN MACKENZIEnbsp;is a Lecturer in Political Thought at the University of Kent, UK. He is the author of Politics: Key Concepts in Philosophy (2009), The Idea of Pure Critique (2004) and co-editor (with Robert Porter and Benoît Dillet) of The Edinburgh Companion to Poststructuralism (forthcoming). ROBERT PORTERnbsp;teaches Cultural and Political Theory at University of Ulster, UK. He is the author of Ideology: Contemporary Social, Political and Cultural Theory (2006), Deleuze and Guattari: Aesthetics and Politics (2009) and co-editor (with Iain Mackenzie and Benoît Dillet) of The Edinburgh Companion to Poststructuralism (forthcoming).