Is mental illness a myth?

In 1961, a young psychiatrist initiated a one-man insurgency against his own profession. ‘Psychiatry is conventionally defined as a medical specialty concerned with the diagnosis and treatment of mental diseases,’ he wrote. ‘I submit that this definition, which is still widely accepted, places psychiatry in the company of alchemy and astrology and commits it to the category of pseudoscience. The reason for this is that there is no such thing as “mental illness”.’

http://www.aeonmagazine.com/world-views/holly-case-thomas-szasz-insanity-plea/