John Uri Lloyd

As John Uri Lloyd, one of the first to actually experience psilocybe mushrooms in the 1800s, warns us in a footnote in his novel Etidorhpa (Aphrodite backwards):

NOTE.- […] If, in the course of experimentation, a chemist should strike upon a compound that in traces only would subject his mind and drive his pen to record such seemingly extravagant ideas as are found in the hallucinations herein pictured, would it not be his duty to bury the discovery from others, to cover from mankind the existence of such a noxious fruit of the chemist's or pharmaceutist’s art? Introduce such an intoxicant, and start it to ferment in humanity's blood, and before the world were advised of its possible results, might not the ever increasing potency gain such headway as to destroy, or debase, our civilization, and even to exterminate mankind?[[61]](https://logosmedia.com/2013/05/manufacturing-the-deadhead-a-product-of-social-engineering-by-joe-atwill-and-jan-irvin/#_edn61)

John Uri Lloyd, 1895 - Etidorhpa