“Stress is nothing more than a socially acceptable form of mental illness.”
“Socialism, is in short a manifestation of mental illness or major character deficiency.”
"Are Socialists Psychos?" https://www.trevorloudon.com/2006/12/are-socialists-psychos/
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Preface to the First Edition.
The Myth of Mental Illness: Foundations of a Theory of Personal Conduct (1961)

As quoted in "Q+A: William H. Macy Finds God" by Simon Abrams, in Esquire online (27 January 2012) http://www.esquire.com/the-side/qa/sundance-2012/william-h-macy-sundance-interview-6647129
[ Link to tweet https://twitter.com/dril/status/1333817949623263232]
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(describing Marx’s view), p. 35.
Capitalism and Modern Social Theory (1971)

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

Source: 1960s, Strength to Love (1963), Ch. 2 : Transformed nonconformist
Context: In his essay "Self-Reliance" Emerson wrote, "Whoso would be a man must be a nonconformist." The Apostle Paul reminds us that whoso would be a Christian must also be a a nonconformist. Any Christian who blindly accepts the opinions of the majority and in fear and timidity follows a path of expediency and social approval is a mental and spiritual slave.

“Well, it's possible to be mentally ill and rational.”
Interview with Helen DeWitt, Author of The Last Samurai.
I Am Other People
is something that sociologists of science and popular culture have yet to fully explain.
Paul Churchland. The Engine of Reason, the Seat of the Soul. (1st ed.). MIT Press. 1995. pp. 181: Talking about Freudian analysis.