With extensive references to Zilboorg’s writing and politics, this book demonstrates the significance of his contributions to the fields of psychiatry and psychoanalysis in the context of his tumultuous intellectual, personal, and spiritual life. In his late work, he would argue, controversially, that there was no incompatibility between psychoanalysis and religion. Grounded in a wealth of primary source material and impressive research, this book completes the compelling biography of a major figure in psychoanalysis. It will be of interest to general readers as well as scholars across a range of disciplines, particularly the history of psychoanalysis and religion.