Abstract
This article reviews the work of the psychiatrist Hugh Mullan, a pioneer of modern group therapy. Heavily influenced by existential philosophy, Hugh Mullan applied notions from that perspective to his innovative and unorthodox approach. Central to this was an early, indeed prescient, advocacy for the use of the therapist’s personal subjectivity, striving for mutuality, and non-rational experience in the conduct of psychotherapy. This way of thinking was not in accord with prevailing theories throughout most of his life as a practitioner (1946–1986); Hugh Mullan was not considered a mainstream theorist in his time. However, contemporary relational theorists have begun to give these ideas a great deal of attention, offering validation and support for his original insights. This writer recalls, as well, his experience of Hugh Mullan as a therapist and mentor.