How ayahuasca became the latest trend in Brooklyn and Silicon Valley

The day after Apollo 14 landed on the moon, Dennis and Terence McKenna began a trek through the Amazon with four friends who considered themselves, as Terence wrote in his book “True Hallucinations,” “refugees from a society that we thought was poisoned by its own self-hatred and inner contradictions.” They had come to South America, the land of yagé, also known as ayahuasca: an intensely hallucinogenic potion made from boiling woody Banisteriopsis caapivines with the glossy leaves of the chacruna bush. The brothers, then in their early twenties, were grieving the recent death of their mother, and they were hungry for answers about the mysteries of the cosmos: “We had sorted through the ideological options, and we had decided to put all of our chips on the psychedelic experience.”