I'm the author of the OP. Happy to talk more about the history of psychedelics.
I also wanted to flag that if anyone is interested in some of the historical sources I cite here (such as the Jesuit talking about ayahuasca in the 18th century) I go into more detail in this journal article, which is open access: https://www.cambridge.org/core/journals/historical-journal/a...
I also wanted to flag that if anyone is interested in some of the historical sources I cite here (such as the Jesuit talking about ayahuasca in the 18th century) I go into more detail in this journal article, which is open access: https://www.cambridge.org/core/journals/historical-journal/a...