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moral insanity. The term was first coined by the Englishman James Cowles Prichard in 1835, though much earlier, Philippe Pinel in Paris described something similar. According to Prichard, any person who demonstrated “eccentricity of conduct”5—or who showed “perversion of the natural feelings, affections, inclinations, temper [or] habits”6—could be diagnosed as morally insane. Crucially, the diagnosis could be given even if the person was not delusional or suffering any mental impairment. Moral insanity affected the emotions. Its sufferers were the irrational angry woman or overwrought, expressive man. In all other ways, patients could appear perfectly sane. (Often, they actually were.)
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