Read about 1/4 of the book and am not sure I can attach finishing it. For all the open-mindedness etc induced by phsychodelics, this bunch of privileged white dudes didn't think of consulting people from cultures other than their own who used psylosybin and other medicine/phsychodelics for generations. That is they call some dudes that came before them "elders" while those elders have only a tiny bit more of knowledge and experience than complete novices (as opposed to, for example, generational shamans), after awhile this omission and writing in only white dudes into those omissions is jarring and yet so typical of how the rest of the history writing goes that I do not want to give it any validity via more of my attention. And then there is a fact that the only people the author bothers to talk to or mention are men, - women are thoroughly erased. Obnoxious. And to top it off, he uses the words like "progress" and"productivity" without irony, so sad and definitely shows limitations of psylosybin for some individuals (author being prime example).