Identity research is at the heart of many trans-disciplinary research centers around the world. No single social science discipline `owns' identity research and The SAGE Handbook of Identities draws on a global scholarship to cover in four parts its: Frameworks: presents the main theoretical and methodological perspectives in identities research.Formations: covers the major formative forces for identities such as culture, globalization, migratory patterns, biology and so on.Categories: reviews research on the core social categories which are central to identity such as ethnicity, gender, sexuality, disability and social class and intersections between these.Sites and Context: develops a series of case studies of crucial sites and contexts where identity is at stake such as social movements, relationships and family life, work-places and environments and citizenship.