Did language emerge from hallucinogenic drug use?
Quote: Terence McKenna hypothesized in his booh ‘Food of the gods’ that as the North African jungles receded and gave way to savannas and grasslands near the end of the most recent ice age, a branch of our tree-dwelling primate ancestors left the forest canopy and began to live in the open areas outside of the forest. There they experimented with new varieties of foods as they adapted, physically and mentally, to their new environment. Among the new food items found in this new environment were psilocybin-containing mushrooms growing near the dung of ungulate herds that occupied the savannas and grasslands at that time. McKenna, referencing the research of Roland L. Fisher, claimed that enhancement of visual acuity was an effect of psilocybin at low doses, and supposed that this would have conferred an adaptive advantage. He also argued that the effects of slightly larger doses, including sexual arousal, and in still larger doses, ecstatic hallucinations and glossolalia gave selective
