
"Enjoyable and insightful work was written as a tribute to the scientific achievements of Richard Evans Schultes, an Amazonia explorer active during 1940s-50s. Also relates explorations of the author and of Timothy Plowman, both Schultes' students. Intended for a popular audience"--Handbook of Latin American Studies, v. 57.
Some incredibly harrowing stories in Wade Davis's One River
There is also a chance some of the disease giving unto the native americans was by accident, not intentional
P.S. Richard Evans Schultes is a very interesting figure in the field of ethnobotanical psychedelic pharmacology, and he was as interested in the plants themselves (peyote, mushrooms, ayahuasca and others) as in the cultural traditions that surrounded them (One River by Wade Davis is a good partial biography).
Likely even longer; if you're curious about some of the anthropology and botany behind mind-altering substances, Wade Davis's One River is excellent: https://www.amazon.com/One-River-Wade-Davis/dp/0684834960?ie.... It focuses on the first half of the 20th C in particular.
As far as I know, it's impossible to know for sure when humans began using mind-altering substances like psychoactive mushroom, peyote, or ayahuasca, but it's likely been a very long time.
https://www.newyorker.com/magazine/2016/09/12/the-ayahuasca-...
