Extreme Rousseauism

"A young artist, a passionate admirer of Rousseau, not obtaining the first prize for sculpture, of which he thought himself deserving, gives himself up to despair. He vows eternal hatred to men, and wishes no longer to live, except after the manner of brutes. He walks upon all fours, and if placed upon a bed rolls himself off upon the ground. If confined, he has convulsions. He will eat nothing but herbs, or crude fruits which he picks up from the ground. If helped to them, he refuses to use them. This condition persists for more than two months, after which he falls into a state of dementia, to which he has a strong predisposition, having several brothers and sisters
affected with this form of disease..."

Esquirol