Peyote: an account of the origins and growth of the Peyote religion.

"The Peyote religion is a medico-religious cult. In considering native American medicines, one must always bear in mind the difference between the aboriginal concept of a medicinal agent and that of our modern Western medicine. Primitive societies, in general, cannot conceive of natural death or illness but believe that they are due to supernatural interference. There are two types of "medicines": those with purely physical effects (i.e., to relieve toothache or digestive upsets); and the medicines, "par excellence", that put the medicine man into communication, through a variety of hallucinations, with the malevolent spirits that cause illness and death" (Schultes & Hofman [1992] https://www.peyote.org/, accessed 6-2019)