A wide-ranging overview of the emergence of post-foundationalism and a survey of the work of its key contemporary exponents.This book presents the first systematic coverage of the conceptual difference between 'politics' (the practice of conventional politics: the political system or political forms of action) and 'the political' (a much more radical aspect which cannot be restricted to the realms of institutional politics). It is also the first introductory overview of post-foundationalism and the tradition of 'left Heideggerianism': the political thought of contemporary theorists who make frequent use of the idea of political difference: Jean-Luc Nancy, Claude Lefort, Alain Badiou and Ernesto Laclau. After an overview of current trends in social post-foundationalism and a genealogical chapter on the historical emergence of the difference between the concepts of 'politics' and 'the political', the work of individual theorists is presented and discussed at length. Individual chapters are presented