Here is the classic edition from 1979—a major integration of original and known theory of group psychotherapy—back in print. Kellerman presents a theoretical integration of the structure of group process, group therapy inherent in that process, and the personality forces of individual members of the group. He shows how these three components unite to produce a therapeutic group environment. The question this work seeks to answer concerns how a ritualized personality structure of individuals intersects with seemingly immutable group processes in a way that creates a therapeutic blending. For the student and clinician alike, this book provides unique yet timeless research and theory.