Has Jacques Lacan's impact on psychoanalysis really been assessed? His formulation that the Freudian unconscious is 'structured like a language' is well-known, but this was only the beginning. There was then the radically new thesis of the 'real unconscious'. Why this step? Searching for the Ariadne's thread that runs throughout Lacan's ever-evolving teaching, this book illuminates the questions implicit in each step, and sheds new light on his revisions and renewals of psychoanalytic concepts. In tracing these, Colette Soler brings out their consequences for the clinic, and in particular, for the subject, for symptoms, for affects, and for the aims of treatment itself. The last section of the book examines the political import of these developments. If many analysts since Freud have dreamt of reinventing psychoanalysis, Colette Soler shows the ways in which Lacan succeeded in this reinvention.