This chapter begins with the description of a typical group therapy session along group analytic lines from an outside observer’s perspective. Then the history and development of group analysis, a specific school of thought in group therapy, follows. Starting with the original beginnings during the Second World War and tracking the personal history of its founder S. H. Foulkes, a Jewish refugee, the interchange with developments in psychiatry and the therapeutic community movement after the war are outlined. More recent influences and developments are indicated.