Stoned ape theory
The stoned ape theory is a controversial hypothesis first proposed by American ethnobotanist and mystic Terence McKenna in his 1992 book Food of the Gods.[1][2] The idea claims that the transition from Homo erectus to Homo sapiens and the cognitive revolution was caused by the addition of psilocybin mushrooms, specifically the mushroom Psilocybe cubensis, into the human diet[3] around 100,000 years ago. Using evidence largely based on studies from Roland L. Fischer et al. from the 1960s and 1970s, he attributed much of the mental strides made by humans during the cognitive revolution to the effects of psilocybin intake found by Fischer.
McKenna's argument has largely been ignored by the scientific community,[4] who cite numerous alleged discrepancies within his theory and claim that his conclusions were arrived at via a fundamental misunderstanding of Fischer's studies. McKenna's theory was not based on scientific evidence.[5]
Overview
[edit]In his book, McKenna argued that due to desertification in Africa, humans retreated to the shrinking tropical forests, following cattle herds whose dung attracted the insects that he states were certainly a part of the human diet at the time. According to his hypothesis, humans would have detected Psilocybe cubensis from this due to it often growing in cowpats.[1]
According to McKenna, access to and ingestion of mushrooms was an evolutionary advantage to humans' omnivorous hunter-gatherer ancestors,[3][1] also providing humanity's first religious impulse. He believed that psilocybin mushrooms were the "evolutionary catalyst" from which language, projective imagination, the arts, religion, philosophy, science, and all of human culture sprang.
Evidence
[edit]To support his claim, McKenna used studies from the Hungarian-American psychopharmacologist Roland L. Fischer dating back to the 1960s and 1970s to underline the purported effects psychedelics would have had on mankind.
McKenna claimed that minor doses of psilocybin improve visual acuity, including edge detection, which bettered the hunting skills of early primates and thus resulted in greater food supply and reproduction. At higher doses, McKenna contended that the mushrooms would increase libido, attention, and energy, resulting in greater reproductive success. At even higher doses, the psilocybin would promote greater social bonding within early human communities as well as group sex activities, resulting in greater genetic diversity from the mixing of genes. McKenna also theorized that at this level of psilocybin intake, it would trigger activity in "language-forming region of the brain", resulting in the mental development of visions and music and kickstarting the development of language by enriching their troop signals. According to McKenna, psilocybin would also chip away at internal ego and make religious matters the forefront of the mind.[1]
Variations
[edit]
Some who hold that the use of drugs played a pivotal role in human development argue that it was not psilocybin that initiated greater cognitive development amongst humans, but was instead spurred by other psychedelics such as DMT-containing substances, in particular, Ayahuasca. Ayahuasca has been shown to increase trait openness significantly by one standard deviation.[6][7] Additionally, it has shown to increase interest in abstract ideas and visual acuity when consumed.[8] This has led to it being hypothesized that some sort of DMT-containing substance was the culprit behind the cognitive revolution.[6] However, psilocin, the active product of psilocybin metabolism, is 4-hydroxy DMT and oral ayahuasca has nearly identical pharmacology and pharmacokinetics as ingesting psilocybin mushrooms.
Reception
[edit]The stoned ape theory had been widely criticized by the greater scientific community. McKenna's theory was labeled as overly speculative by much of the academic community[9] and misrepresenting the studies of psychopharmacologist Roland L. Fischer, whose research was frequently cited by McKenna as evidence for the purported effects of the mushrooms on early humans. Additionally, many pointed to groups such as the Aztecs or various Amazonian tribes whose usage of psychedelic substances does not reflect any of the evolutionary advantages that McKenna argued would emerge from using psilocybin-containing substances.[10][11]
See also
[edit]- Aquatic ape theory
- Evolutionary models of human drug use
- Psilocybin
- Psilocybin mushroom
- Drunken monkey hypothesis
References
[edit]- ^ a b c d McKenna, Terence (1999). Food of the Gods: The Search for the Original Tree of Knowledge : a Radical History of Plants, Drugs and Human Evolution. Rider. ISBN 978-0-7126-7038-8.
- ^ "Psilocybin, the Mushroom, and Terence McKenna". www.vice.com. 12 August 2014. Retrieved 2022-12-10.
- ^ a b Letcher, Andy (2008-02-19). Shroom: A Cultural History of the Magic Mushroom. Harper Collins. ISBN 978-0-06-082829-5.
- ^ Nutt, David; Castle, David (2023-03-07). Psychedelics as Psychiatric Medications. Oxford University Press. p. 2. ISBN 978-0-19-267852-2.
- ^ Helvenston, Patricia A. (May 2015). "Psilocybin-containing mushrooms, upper palaeolithic rock art and the neuropsychological model". Rock Art Research. 32 (1): 101.
- ^ a b Netzband, Nige; Ruffell, Simon; Linton, S.; Tsang, W. F.; Wolff, T. (2020-10-01). "Modulatory effects of ayahuasca on personality structure in a traditional framework". Psychopharmacology. 237 (10): 3161–3171. doi:10.1007/s00213-020-05601-0. ISSN 1432-2072. PMC 7524857. PMID 32700023.
- ^ Mendes Rocha, Juliana; Rossi, Giordano Novak; Osório, Flávia L.; Bouso Saiz, José Carlos; Silveira, Gabriela De Oliveira; Yonamine, Mauricio; Crevelin, Eduardo José; Queiroz, Maria Eugênia; Cecílio Hallak, Jaime E.; Dos Santos, Rafael Guimarães (2021). "Effects of Ayahuasca on Personality: Results of Two Randomized, Placebo-Controlled Trials in Healthy Volunteers". Frontiers in Psychiatry. 12: 688439. doi:10.3389/fpsyt.2021.688439. ISSN 1664-0640. PMC 8377499. PMID 34421675.
- ^ Hamill, Jonathan; Hallak, Jaime; Dursun, Serdar M.; Baker, Glen (August 6, 2021). "Ayahuasca: Psychological and Physiologic Effects, Pharmacology and Potential Uses in Addiction and Mental Illness". Current Neuropharmacology. 17 (2): 108–128. doi:10.2174/1570159X16666180125095902. ISSN 1570-159X. PMC 6343205. PMID 29366418.
- ^ Olsen, Oscar. "The Stoned Ape Hypothesis, A Contemporary Reappraisal".
{{cite journal}}: Cite journal requires|journal=(help) - ^ Pinchbeck, Daniel (2003-08-12). Breaking Open the Head: A Psychedelic Journey into the Heart of Contemporary Shamanism. Crown. ISBN 978-0-7679-0743-9.
- ^ War & the Noble Savage. Dreamflesh. ISBN 978-0-9554196-2-1.