Andrew Linzey is a member of the Faculty of Theology, Oxford University, and Bede Jarrett Senior Research Fellow at Blackfriars. He is also honorary professor in theology at Birmingham University and special professor at Saint Xavier University, Chicago. He has written or edited twenty books, including Aninal Theology, Animal Rites: Liturgies of Animal Care, and Animals on the Agenda: Questions about Animals for Theology and Ethics.

Paul Barry Clarke, as a teacher and researcher in the Department of Government at the University of Essex, has written and edited over twelve books in political philosophy. He is the author of Autonomy Unbound, Deep Citizenship, and Citizenship, and has recently coedited and contributed to the Encyclopedia of Democratic Thought.