Aaron Ridley is a Professor of Philosophy at the University of Southampton. He is the author of Nietzsche's Conscience: Six Character Studies from the 'Genealogy' (Cornell University Press, 1998), R.G. Collingwood: A Philosophy of Art (Orion Books, 1998) and Music, Value and the Passions (Cornell University Press, 1995) and the co-editor, with Alex Neill, of Arguing About Art (McGraw-Hill, 1995; 2nd edition: Routledge, 2002) and The Philosophy of Art (McGraw-Hill, 1995).