‘Authenticity’ is a quality that has drawn a polarised response in the history of philosophy, especially in discussions of the self. Is there something that captures who I really am? And if so, should I try to find out what that is? And if not, then what’s all the fuss about? At the outset, it’s useful to distinguish two senses in which there might be an ‘authentic self’: a naturalistic sense and a more strictly normative one.