"This educative, wide-ranging and informative book argues that participation in social groups improves mental health and well being. While neuropsychologists may be most interested in the four chapters that are directly concerned with neurologically impaired people, the remaining chapters will inform them of the benefits of groups in other areas such as survivors of disasters, rape victims and concentration camp survivors." - Barbara Wilson, The Oliver Zangwill Centre for Neuropsychological Rehabilitation, Ely, UK"This volume does an excellent job at integrating different perspectives on the complex relationship between identity and health. It assesses the risks and resources associated with social identities and outlines concrete interventions that take advantage of these insights. It is an invaluable resource for all those interested in health issues in psychology." - Naomi Ellemers, Professor of Social Psychology of Organisations, Leiden University, The Netherlands