Robert Garner is Professor of Politics at the University of Leicester. Siobhan O'Sullivan is Lecturer in Social Policy at the University of New South Wales, Australia. Contributors: Peter Chen, Senior Lecturer in Government and International Relations, University of Sydney; Alasdair Cochrane, Senior Lecturer in Political Theory, University of Sheffield; Steve Cooke, University Teacher in Theory and Animal Rights, University of Sheffield; Dan Lyons, CEO, Centre for Animals and Social Justice; Tony Milligan, Lecturer in Philosophy, University of Hertfordshire; Lucy Parry, Graduate Student, University of Sheffield; Friederike Schmitz, Assistant Professor of Philosophy, Humboldt University Berlin; Kimberley Smith, Professor of Environmental Studies and Political Science, Carleton College