Robert W. Firestone, PhD, psychologist and author, has been affiliated with the Glendon Association as its consulting theorist since its inception. His innovative ideas related to psychotherapy, couple and family relationships, suicide, parenting, and existential issues have been the inspiration and cornerstone of Glendon's research and publications.

From 1957 to 1979, Dr. Firestone was engaged in the private practice of psychotherapy as a clinical psychologist working with a wide range of patients. From that time up to the present he has worked with high-functioning individuals in group settings, amplifying his original ideas on schizophrenia and applying these concepts to a comprehensive theory of neurosis.

Dr. Firestone's studies on negative thought processes and their associated effects have led to the development of Voice Therapy, an advanced therapeutic methodology to uncover and contend with aspects of self-destructive and self-limiting behaviors.

Dr. Firestone is the author of many books, most recently The Self Under Siege: A Therapeutic Model for Differentiation, with Lisa Firestone and Joyce Catlett.