shamanism in modern arizona ... i just asked the question ... and the internet gave me this interesting account of past and present practice and belief ...
https://indiantraders.com/blogs/news/native-american-shamanism
Posts
a scientific study of a small cohort of cannabis users presenting to the medics with varying degrees of psychosis ... i would guess that the likelihood of cannabis users co-operating with scientists over a long period of time is small
https://jamanetwork.com/journals/jamapsychiatry/fullarticle/2832297 Question Is cannabis associated with the same midbrain dopamine pathway involved in psychosis?