Milton Hyland Erickson was an American psychiatrist and psychologist specializing in medical hypnosis and family therapy. He was the founding president of the American Society for Clinical Hypnosis. He is noted for his approach to the unconscious mind as creative and solution-generating. He is also noted for influencing brief therapy, strategic family therapy, family systems therapy, solution focused brief therapy, and neuro-linguistic programming.

Jay Douglas Haley was one of the founding figures of Problem-solving brief therapy and family therapy in general and of the strategic model of psychotherapy, and he was one of the more accomplished teachers, clinical supervisors, and authors in these disciplines.