Carl Gustav Jung was a Swiss psychiatrist and psychoanalyst who founded analytical psychology.
Frantz Fanon was a psychiatrist, philosopher, revolutionary, and writer from the French colony of Martinique, whose works are influential in the fields of post-colonial studies, critical theory, and Marxism. As an intellectual, Fanon was a political radical, Pan-Africanist, and Marxist humanist concerned with the psychopathology of colonization, and the human, social, and cultural consequences of decolonization.
SS-Obersturmführer Irmfried Eberl was an Austrian psychiatrist and medical director of the euthanasia institutes in Brandenburg and Bernburg, who helped set up and was the first commandant of the Treblinka extermination camp where he worked from 11 July 1942 until his dismissal on 26 August 1942. He was arrested after the end of the war in January 1948. Eberl hanged himself the following month to avoid trial.
Ronald David Laing, usually cited as R. D. Laing, was a Scottish psychiatrist who wrote extensively on mental illness – in particular, the experience of psychosis. Laing's views on the causes and treatment of psychopathological phenomena were influenced by his study of existential philosophy and ran counter to the chemical and electroshock methods that had become psychiatric orthodoxy. Taking the expressed feelings of the individual patient or client as valid descriptions of lived experience rather than simply as symptoms of mental illness, Laing regarded schizophrenia as a theory not a fact. Though associated in the public mind with anti-psychiatry he rejected the label. Politically, he was regarded as a thinker of the New Left. Laing was portrayed in the 2017 film Mad to Be Normal.
Hermann Rorschach was a Swiss Freudian psychiatrist and psychoanalyst. His education in art helped to spur the development of a set of inkblots that were used experimentally to measure various unconscious parts of the subject's personality. His method has come to be referred to as the Rorschach Test, iterations of which have continued to be used over the years to help identify personality, psychotic, and neurological disorders. Rorschach continued to refine the test until his premature death at age 37. Rorschach lived a short yet successful life while influencing the world of psychology.
Viktor Emil Frankl was an Austrian neurologist and psychiatrist as well as a Holocaust survivor. Frankl was the founder of logotherapy, which is a form of existential analysis, the "Third Viennese School of Psychotherapy". His best-selling book Man's Search for Meaning chronicles his experiences as a concentration camp inmate, which led him to discover the importance of finding meaning in all forms of existence, even the most brutal ones, and thus, a reason to continue living. Frankl became one of the key figures in existential therapy and a prominent source of inspiration for humanistic psychologists.
Karl Theodor Jaspers was a German-Swiss psychiatrist and philosopher who had a strong influence on modern theology, psychiatry, and philosophy. After being trained in and practicing psychiatry, Jaspers turned to philosophical inquiry and attempted to discover an innovative philosophical system. He was often viewed as a major exponent of existentialism in Germany, though he did not accept the label.
Aaron Temkin Beck is an American psychiatrist who is professor emeritus in the department of psychiatry at the University of Pennsylvania. He is regarded as the father of cognitive therapy, and his pioneering theories are widely used in the treatment of clinical depression. Beck also developed self-report measures of depression and anxiety, notably the Beck Depression Inventory (BDI) which became one of the most widely used instruments for measuring depression severity.
Milton Hyland Erickson was an American psychiatrist and psychologist specializing in medical hypnosis and family therapy. He was founding president of the American Society for Clinical Hypnosis and a fellow of the American Psychiatric Association, the American Psychological Association, and the American Psychopathological Association. 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.
Brian Leslie Weiss is an American psychiatrist, hypnotherapist, and author who specializes in so-called past life regression, a field identified as pseudoscience. His research includes purported reincarnation, past life regression, future life progression, and survival of the human soul after death.