This third edition builds on the international success of previous editions, offering an easy access critical introduction to social science theories of identity, for advanced undergraduates and postgraduates. All of the previous chapters have been updated and extra material has been added where relevant, for example, on globalization. Two new chapters have been added; one addresses the debate about whether identity matters, discussing, for example, Brubaker; the second reviews the postmodern approach to identity. The text is informed by relevant topical examples throughout and, as with earlier editions, the emphasis is on sociology, anthropology and social psychology; on the interplay between relationships of similarity and difference; on interaction; on the categorization of others as well as self-identification; and on power, institutions and organizations.