Graham Hancock is a British writer and journalist who specialises in theories involving ancient civilisations, stone monuments or megaliths, altered states of consciousness, ancient myths and astronomical/astrological data from the past.

Hancock gave a TEDx lecture titled “The War on Consciousness”, in which he outlined a case for the use of ayahuasca, an amazonian tea containing an hallucinogenic and illegal compound DMT. While making clear that drinking ayahuasca may often be a physical ordeal, and that he did not approve of its use for casual recreation, he said that it may be essential for self-improvement, spiritual growth and social progress, as well as for curing drug addiction. He revealed that until relatively recently he had maintained a 24-year-long daily cannabis habit during which he was “stoned for 16 hours a day”, and had suffered from rages and paranoia as a result. Hancock said he had been successfully cured by an experience with ayahuasca in South America, during which he experienced an arduous life-review by the Amerind spirit “Mother Ayahuasca”.

"All of us at some point have to put on masks to "fit" in with the world around us, the problem isn't putting them on however, but knowing you have one on."