Ponderous though this compilation is, its scope and specificity could hardly have been attained in fewer pages. The practice of group psychotherapy has proliferated into such various forms and is so widely used that the term 'group therapy', unqualified, may denote any one of many procedures, each based on contradictory concepts. The origins of these procedures in theories of psychodynamics under particular historical circumstances are set forth in an introduction. Here E. James Anthony looks back to Le Bon