The One and the Many: Relational Approaches to Group Psychotherapy applies advances in relational psychoanalysis to the theory and practice of group psychotherapy. In this volume Robert Grossmark and Fred Wright bring together leading writers in the group psychotherapy field, both psychoanalysts and group therapists, who have integrated ideas from contemporary relational psychoanalysis. Together, they constitute a vibrant and dynamic new wave in group psychotherapy and psychoanalysis that challenge much accepted wisdom and practice in the field, including classic group psychotherapy ideas regarding the therapist's role, the group-as-a-whole and unconscious processes in group. In this book, Grossmark and Wright show how the development of relational psychoanalysis has had a transformative impact on the field of psychoanalysis that has reverberated in the group psychotherapy world. The contributors illustrate how the broadening scope of the contemporary relational scene offers much that coheres with and amplifies the theory and practice of group treatment. The focus on dissociation, enactment, trauma, mutuality and intersubjectivity in the clinical setting, the foregrounding of sub-symbolic communication and implicit relational knowing, the registration of mutual containment and mutual regulation, all open new and exciting vistas for understanding the process and healing properties of group treatment. The One and The Many expands the theory and practice of group psychotherapy offering innovative and refreshing　ways to understand group interaction and to formulate interventions in both large and small groups. This book will be of interest and practical help to all who practice group psychotherapy, group process, psychoanalysis and psychotherapy in general, including all mental health practitioners, psychoanalysts, psychotherapists, psychiatrists, social workers, counsellors and pastoral counsellors.