The Canadian philosopher Charles Taylor is a key figure in contemporary debates about the self and the problems of modernity. This book provides a comprehensive, critical account of Taylor's work. It succinctly reconstructs the ambitious philosophical project that unifies Taylor's diverse writings. And it examines in detail Taylor's specific claims about the structure of the human sciences; the link between identity, language, and moral values; democracy and multiculturalism; and the conflict between secular and non-secular spirituality. The book also includes the first sustained account of Taylor's career as a social critic and political activist. Clearly written and authoritative, this book will be welcomed by students and researchers in a wide range of disciplines, including philosophy, psychology, politics, sociology, anthropology, cultural studies and theology.