In 1955, R. Gordon Wasson decided to participate in a sacred Indian ceremony that was held in southern Mexico and called "pathway to the divine". According to Michael Pollan's book How to Change Your Mind and some others, Wasson's trip played an important role in "promoting mind-bending drugs and the accompanying cultural revolution". Poisoner in Chief provides information about this trip and the life of Wasson; he explained how the CIA supported the financial cost of the trip without knowing Wasson.