Stephen A. Diamond, Ph.D. (born 1951) is a licensed American clinical and forensic psychologist, a former pupil and protégé of Dr. Rollo May, and notable author of Anger, Madness, and the Daimonic. His work focuses on the psychological topics of anger, violence, evil, mental illness, and the daimonic.
After practicing in the San Francisco Bay Area for more than 20 years, he relocated in 1999 to Los Angeles, where he currently resides and maintains a private psychotherapy practice in the Beverly Hills area. In addition to specializing in adult psychotherapy, Dr. Diamond is a designated forensic psychologist for the Los Angeles Superior Court. He is currently a resident faculty member in the Department of Psychology at both Argosy University and Ryokan College in Los Angeles. He serves on the Board of Editors of the Journal of Humanistic Psychology.
- Contributor to Meeting the Shadow by Connie Zweig (1991), Tarcher: ISBN 0-87477-618-X
- Anger, Madness, and the Daimonic: The Psychological Genesis of Violence, Evil, and Creativity (1996), SUNY Press: ISBN 0-7914-3075-8