Graham Bird is Emeritus Professor of Philosophy at the University of Manchester, and Honorary Senior Research Fellow at the University of Liverpool. He has been a leading Kant scholar for nearly 40 years, and is the author of Kant's Theory of Knowledge (1962), Philosophical Tasks (1972), and William James  (1986), and Revolutionary Kant: A Commentary on the Critique of Pure Reason  (2006). He is a past president of the Aristotelian Society and Chair of the UK Kant Society.