
Giorgio Antonucci was an Italian physician, known for his questioning of the basis of psychiatry.

Franco Basaglia was an Italian psychiatrist, neurologist, professor who proposed the dismantling of psychiatric hospitals, pioneer of the modern concept of mental health, Italian psychiatry reformer, figurehead and founder of Democratic Psychiatry architect, and principal proponent of Law 180 which abolished mental hospitals in Italy. He is considered to be the most influential Italian psychiatrist of the 20th century.

Sir Mason Harold Durie is a New Zealand professor of Māori Studies and research academic at Massey University. He is known for his contributions to Māori health.

Leon Eisenberg, was an American child psychiatrist, social psychiatrist and medical educator who "transformed child psychiatry by advocating research into developmental problems"

Semen (Semyon) Fishelevich Gluzman is a Ukrainian psychiatrist and human rights activist.

David Healy, a professor of psychiatry at Bangor University in the United Kingdom, is a psychiatrist, psychopharmacologist, scientist and author. His main areas of research are the contribution of antidepressants to suicide, conflict of interest between pharmaceutical companies and academic medicine, and the history of pharmacology. Healy has written more than 150 peer-reviewed articles, 200 other articles, and 20 books, including The Antidepressant Era, The Creation of Psychopharmacology, The Psychopharmacologists Volumes 1–3, Let Them Eat Prozac and Mania: A Short History of Bipolar Disorder.

Anatoly Ivanovich Koryagin is a psychiatrist and Soviet dissident. He holds a Candidate of Science degree. Along with others, he exposed political abuse of psychiatry in the Soviet Union. He pointed out Russia constructed psychiatric prisons to punish dissidents.

Emil Wilhelm Georg Magnus Kraepelin was a German psychiatrist. H. J. Eysenck's Encyclopedia of Psychology identifies him as the founder of modern scientific psychiatry, psychopharmacology and psychiatric genetics.

Herbert Pardes is an American physician, psychiatrist, and the executive vice-chairman of NewYork–Presbyterian Hospital.

Victor Andreevich Skumin is a Russian and Soviet scientist, psychiatrist, philosopher and writer.

Thomas Stephen Szasz was a Hungarian-American academic, psychiatrist and psychoanalyst. He served for most of his career as professor of psychiatry at the State University of New York Upstate Medical University in Syracuse, New York. A distinguished lifetime fellow of the American Psychiatric Association and a life member of the American Psychoanalytic Association, he was best known as a social critic of the moral and scientific foundations of psychiatry, as what he saw as the social control aims of medicine in modern society, as well as scientism. His books The Myth of Mental Illness (1961) and The Manufacture of Madness (1970) set out some of the arguments most associated with him.

Robert van Voren is a Dutch human rights activist, sovietologist and historian.