“It is customary to define psychiatry as a medical specialty concerned with the study, diagnosis and treatment of mental illnesses. This is a worthless and misleading definition. Mental illness is a myth. Psychiatrists are not concerned with mental illnesses and their treatments. In actual practice they deal with personal, social and ethical problems in living.
I have argued that, today, the notion of a person "having a mental illness" is scientifically crippling. It provides professional assent to a popular rationalization — namely that problems in living experienced and expressed in terms of so-called psychiatric symptoms are basically similar to bodily diseases.
Moreover, the concept of mental illness also undermines the principle of personal responsibility, the ground on which all free political institutions rest.”

—  Thomas Szasz

Conclusions.
The Myth of Mental Illness: Foundations of a Theory of Personal Conduct (1961)

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Thomas Szasz70
Hungarian psychiatrist 1920–2012

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