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An entheogen, in the strictest sense, is a psychoactive substance used in a religious or shamanic context. Entheogens generally come from plant sources which contain molecules closely related to endogenous neurochemicals. They occur in a wide variety of sacraments of various religious rites [UDV/NAC] and have been shown (Good Friday Experiment) to directly provoke what users perceive as spiritual/mystical experiences. In a broader sense, the word "entheogen" refers to any molecule which stimulates the central nervous system through one of the two main neurological pathways: Phenethylamine [which is a brain chemical associated with the adrenaline pathway, and a precursor of Mescaline, 2-CB] and Tryptamine [a brain chemical associated with the natural metabolism of Serotonin, a precursor of Psilocin, DMT ]. (Biochemical Basis of Neuropharmacology, Cooper Bloom Roth - PIHKAL, Shulgin) In the aforementioned books the pathways of the neurochemicals are described as occurring from simpler precursors. Through enzyme reactions, the brain creates more complex molecules with a higher binding affinity with unique neurological and cognitive results. See Federal Analog Act.

These chemicals are the essence of the entheogens and are banned neurotransmitters, despite their use predating written language. Entheogens are molecules which induce alterations of consciousness identical in many ways to those documented for ritual ingestion of traditional shamanic inebriants. Examples are far reaching ancient sources predating the modern era: such as Hebrew: manna; Greek: kykeon; African: Iboga; Vedic: Soma, Amrit. Entheogens have been safely utilized in a religious context for thousands of years.



The word entheogen is a neologism derived from the ancient Greek : ἔνθεος (entheos) and γενέσθαι (genesthe). Entheos literally means "god (theos) within", translates as "inspired" and is the root of the English word "enthusiasm". The Greeks used it as a term of praise for poets and other artists[citation needed]. Genesthe means "to generate". So an entheogen is "that which generates God (or godly inspiration) within a person".

The word entheogen was coined in 1979 by a group of ethnobotanists and scholars of mythology (Carl A. P. Ruck, Jeremy Bigwood, Danny Staples, Richard Evans Schultes, Jonathan Ott and R. Gordon Wasson). The literal meaning of the word is "that which causes God to be within an individual". The translation "creating the divine within" is sometimes given, but it should be noted that entheogen implies neither that something is created (as opposed to just perceiving something that is already there) nor that that which is experienced is within the user (as opposed to having independent existence).

It was coined as a replacement for the terms "hallucinogen" (popularized by Aldous Huxley's experiences with mescaline, published as The Doors of Perception in 1953) and "psychedelic" (a Greek neologism for "mind manifest", coined by psychiatrist Humphry Osmond, who was quite surprised when the well-known author, Aldous Huxley, volunteered to be a subject in experiments Osmond was running on mescaline). Ruck et al. argued that the term "hallucinogen" was inappropriate due to its etymological relationship to words relating to delirium and insanity. The term "psychedelic" was also seen as problematic, due to the similarity in sound to words pertaining to psychosis and also due to the fact that it had become irreversibly associated with various connotations of 1960s pop culture.

The meanings of the term "entheogen" were formally defined by Ruck et al.:

In a strict sense, only those vision-producing drugs that can be shown to have figured in shamanic or religious rites would be designated entheogens, but in a looser sense, the term could also be applied to other drugs, both natural and artificial, that induce alterations of consciousness similar to those documented for ritual ingestion of traditional entheogens.

Since 1979, when the term was proposed, its use has become widespread in certain circles. In particular, the word fills a vacuum for those users of entheogens who feel that the term "hallucinogen", which remains common in medical, chemical and anthropological literature, denigrates their experience and the world view in which it is integrated. Use of the strict sense of the word has therefore arisen amongst religious entheogen users, and also amongst others who wish to practice spiritual or religious tolerance.

The use of the word "entheogen" in its broad sense as a synonym for "hallucinogenic drug" has attracted criticism on three grounds:

  • On pragmatic grounds, the objection has been raised that the meaning of the strict sense of "entheogen", which is of specific value in discussing traditional, historical and mythological uses of entheogens in religious settings, is likely to be diluted by widespread, casual use of the term in the broader sense.
  • Secondly, some people object to the misuse of the root theos (god in ancient Greek) in the description of the use of hallucinogenic drugs in a non-religious context, and coupled with the climate of religious tolerance or pluralism that prevails in many present-day societies, the use of the root theos in a term describing non-religious drug use has also been criticised as a form of taboo deformation.
  • Thirdly, there are some substances that at least partially fulfill the definition of an entheogen that is given above, but are not considered hallucinogenic in the usual sense. One important example is the bread and wine of the Christian (especially Roman Catholic and Episcopal) Eucharist -- assuming that the Eucharist was always non-entheogenic as it has been in most modern-era Christian groups. The 'bread' and 'wine' of early Christianity were discussed and treated in a way that fits the description of an entheogenic substance; ingesting the Eucharist induced the Holy Spirit, as a shared unity-experience in the mystic altered state.

Ideological objections to the broad use of the term often relate to the widespread existence of taboos surrounding psychoactive drugs, with both religious and secular justifications. The perception that the broad sense of the term "entheogen" is used as a euphemism by hallucinogenic drug-users bothers both critics and proponents of the secular use of hallucinogenic drugs. Critics frequently see the use of the term as an attempt to obscure what they perceive as illegitimate motivations and contexts of secular drug use. Some proponents also object to the term, arguing that the trend within their own subcultures and in the scientific literature towards the use of term "entheogen" as a synonym for "hallucinogen" devalues the positive uses of drugs in contexts that are secular but nevertheless, in their view, legitimate.

Beyond the use of the term itself, the validity of drug-induced, facilitated, or enhanced religious experience has been questioned. The claim that such experiences are less valid than religious experience without the use of any chemical catalysts faces the problem that the descriptions of religious experiences by those using entheogens are indistinguishable from many reports of religious experiences without drugs. The claim also depends on the assumption that the reports of well-known mystics were not influenced by ingesting visionary plants, an assumption which Dan Merkur calls into question[1].

In an attempt to empirically answer the question about whether drugs can actually facilitate religious experience, the Marsh Chapel Experiment was conducted by physician and theology doctoral candidate, Walter Pahnke, under the supervision of Timothy Leary and the Harvard Psilocybin Project. In the double-blind experiment, volunteer graduate school divinity students from the Boston area almost all claimed to have had profound religious experiences under the influence of psilocybin.

In 2006, a more rigorously controlled version of this experiment was conducted at Johns Hopkins University, yielding very similar results.

Use of entheogens

Naturally occurring entheogens such as psilocybin and dimethyltryptamine (in ayahausca) were, for the most part, discovered and used by older cultures, as part of their spiritual and religious life, as plants and agents which were respected, or in some cases revered. By contrast, artificial and modern entheogens, such as MDMA, never had a tradition of religious use.

Entheogens have been used in various ways, including as part of established traditions and religions, secularly for personal spiritual development, as a tool to augment the mind, secularly as recreational drugs, and medical and therapeutic use.

Entheogen-using cultures

The use of entheogens in human cultures is generally ubiquitous throughout recorded history.


The best-known entheogen-using culture of Africa is the Bwitists, who used a preparation of the root bark of Iboga (Tabernanthe iboga).[2] A famous entheogen of ancient Egypt is the blue lotus (Nymphaea caerulea). There is evidence for the use of entheogenic mushrooms in Côte d'Ivoire (Samorini 1995). Numerous other plants used in shamanic ritual in Africa, such as Silene capensis sacred to the Xhosa, are yet to be investigated by western science.


Entheogens have played a pivotal role in the spiritual practices of most American cultures for millennia. The first American entheogen to be subject to scientific analysis was the peyote cactus (Lophophora williamsii). For his part, one of the founders of modern ethno-botany, the late Richard Evans Schultes of Harvard University documented the ritual use of peyote cactus among the Kiowa who live in what became Oklahoma. Used traditionally by many cultures of what is now Mexico, its use spread to throughout North America in the 19th century, replacing the toxic entheogen Sophora secundiflora (mescal bean). Other well-known entheogens used by Mexican cultures include psilocybin mushrooms (known to indigenous Mexicans under the Náhuatl name teonanácatl), the seeds of several morning glories (Náhuatl: tlitlíltzin and ololiúhqui) and Salvia divinorum (Mazateco: Ska Pastora; Náhuatl: pipiltzintzíntli).

  Indigenous peoples of South America employ a wide variety of entheogens. Better-known examples include ayahuasca (Banisteriopsis caapi plus admixtures) among indigenous peoples (such as the Urarina) of Peruvian Amazonia. Other well-known entheogens include: borrachero (Brugmansia spp); San Pedro Trichocereus spp); and various tryptamine-bearing snuffs, for example Epená (Virola spp), Vilca and Yopo (Anadananthera spp). The familiar tobacco plant, when used uncured in large doses in shamanic contexts, also serves as an entheogen in South America. Also, a tobacco that contains higher nicotine content, and therefore smaller doses required, called Nicotiana rustica was commonly used.[citation needed]

In addition to indigenous use of entheogens in the Americas, one should also note their important role in contemporary religious movements, such as the Rastafari movement and the Church of the Universe.


The indigenous peoples of Siberia (from whom the term shaman was appropriated) have used the fly agaric mushroom (Amanita muscaria) as an entheogen. The ancient inebriant Soma, mentioned often in the Vedas, may have been an entheogen. (In his 1967 book, Wasson argues that Soma was fly agaric. The active ingredient of Soma is presumed by some to be ephedrine, an alkaloid with stimulant and (somewhat debatable) entheogenic properties derived from the soma plant, identified as Ephedra pachyclada.) However, there are also arguments to suggest that Soma could have also been Syrian Rue, Cannabis, or some combination of any of the above plants.


An early entheogen in Aegean civilization, predating the introduction of wine, which was the more familiar entheogen of the reborn Dionysus and the maenads, was fermented honey, known in Northern Europe as mead; its cult uses in the Aegean world are bound up with the mythology of the bee.

The extent of the use of visionary plants throughout European history has only recently been seriously investigated, since around 1960. The use of entheogens in Europe is thought, by most entheogen scholars, to have become greatly reduced by the time of the rise of post-Roman Christianity and especially during the great witch hunts of Early Modernity. European witches used various entheogens, including thorn-apple (Datura), deadly nightshade (Atropa belladonna), mandrake (Mandragora officinarum) and henbane (Hyoscyamus niger). These plants were used, among other things, for the manufacture of "flying ointments". In Christian society, witches were commonly believed to fly through the air on broomsticks after coating them with the ointment and applying them to the skin.

Any association with these plants could have proven dangerous, leading to one's execution as a "practitioner of witchcraft". The vehemence of some Christian groups suppressing such use of visionary plants renders inconclusive the question of how widespread the use of visionary plants was throughout Christendom; from one perspective, clamping down on psychoactives appears to indicate the absence of use, if successful suppression is assumed, while from the other perspective, indicates widespread presence of use.

The imposition of Roman Christianity also saw the end of the two-thousand-year-old tradition of the Eleusinian Mysteries, the initiation ceremony for the cult of Demeter and Persephone involving the use of a possibly entheogenic substance known as kykeon. Similarly, there is evidence that nitrous oxide or ethylene may have been in part responsible for the visions of the equally long-lived Delphic oracle (Hale et al., 2003).

In ancient Germanic culture cannabis was associated with the Germanic love goddess Freya. The harvesting of the plant was connected with an erotic high festival. It was believed that Freya lived as a fertile force in the plant's feminine flowers and by ingesting them one became influenced by this divine force. Similarly, fly agaric was consecrated to Odin, the god of ecstasy, while henbane stood under the dominion of the thunder god - Thor in Germanic mythology - and Jupiter among the Romans (Rätsch 2003).

In modern-era Christianity, at least, the Eucharist plays a symbolic role in religious tradition that has occasionally attracted the label of "entheogen" or "placebo entheogen", even though the modern-era mainstream Eucharistic practice does not conform to the definition of entheogenic as a vision-inducing substance.

Middle East

The entheogenic use of substances, particularly hashish. Its use by the "Hashshashin" to stupefy and recruit new initiates was widely reported during the Crusades. However, the drug used by the Hashshashin was likely wine, opium, henbane, or some combination of these, and, in any event, the use of this drug was for stupefaction rather than for entheogenic use. It has been suggested that the ritual use of small amounts of Syrian Rue is an artifact of its ancient use in higher doses as an entheogen.

Philologist John Marco Allegro has argued in his book The Sacred Mushroom and the Cross that early Jewish and Christian cultic practice was based on the use of Amanita muscaria which was later forgotten by its adherents, though this hypothesis has not received much consideration or become widely accepted. Allegro's hypothesis that Amanita use was forgotten after primitive Christianity seems contradicted by his own view that the chapel in Plaincourault shows evidence of Christian Amanita use in the 1200s. [3]


Indigenous Australians are generally supposed not to have used entheogens, although there is a strong barrier of secrecy surrounding Aboriginal shamanism, which has likely limited what has been told to outsiders. Natives of Papua New Guinea are known to use several species of entheogenic mushrooms (Psilocybe spp, Boletus manicus).[4]

Kava or Kava Kava (Piper Methysticum) has been cultivated for at least 3000 years by a number of Pacific island-dwelling peoples. Historically, most Polynesian, many Melanesian, and some Micronesian cultures have ingested the psychoactive pulverized root, typically taking it mixed with water. Much traditional usage of Kava, though somewhat suppressed by Christian missionaries in the 19th and 20th centuries, is thought to facilitate contact with the spirits of the dead, especially relatives and ancestors (Singh 2004). Also, it has been suggested that the Māori of New Zealand used the biologically related "Māori Kava" or kawakawa (Macropiper excelsum) as an entheogen (Bock 2000).

In the archaeological record

There have been several examples of the use of entheogens in the archaeological record. Many of these researchers, like R. Gordon Wasson or Giorgio Samorini[5][6], have recently produced a plethora of evidence, which has not yet received consideration within academia. The first direct evidence of entheogen use comes from Tassili, Algeria, with a cave painting of a mushroom-man, dating to 8000 BP. Hemp seeds discovered by archaeologists at Pazyryk suggest early ceremonial practices by the Scythians occurred during the 5th to 2nd century BC, confirming previous historical reports by Herodotus.

In classical mythology and cults

Although entheogens are taboo and most of them are officially prohibited in Christian and Islamic societies, their ubiquity and prominence in the spiritual traditions of various other cultures is unquestioned. The entheogen, "the spirit, for example, need not be chemical, as is the case with the ivy and the olive: and yet the god was felt to be within them; nor need its possession be considered something detrimental, like drugged, hallucinatory, or delusionary: but possibly instead an invitation to knowledge or whatever good the god's spirit had to offer." (Ruck and Staples)

Most of the well-known modern examples, such as peyote, psilocybe and other psychoactive mushrooms and ololiuhqui, are from the native cultures of the Americas. However, it has also been suggested that entheogens played an important role in ancient Indo-European culture, for example by inclusion in the ritual preparations of the Soma, the "pressed juice" that is the subject of Book 9 of the Rig Veda. Soma was ritually prepared and drunk by priests and initiates and elicited a paean in the Rig Veda that embodies the nature of an entheogen:

"Splendid by Law! declaring Law, truth speaking, truthful in thy works, Enouncing faith, King Soma!... O [Soma] Pavāmana, place me in that deathless, undecaying world wherein the light of heaven is set, and everlasting lustre shines.... Make me immortal in that realm where happiness and transports, where joy and felicities combine..."

The Kykeon that preceded initiation into the Eleusinian Mysteries is another entheogen, which was investigated (before the word was coined) by Carl Kerenyí, in Eleusis: Archetypal Image of Mother and Daughter. Other entheogens in the Ancient Near East and the Aegean include the poppy, Datura, the unidentified "lotus" eaten by the Lotus-Eaters in the Odyssey and Narkissos.

According to Ruck, Eyan, and Staples, the familiar shamanic entheogen that the Indo-Europeans brought with them was knowledge of the wild Amanita mushroom. It could not be cultivated; thus it had to be found, which suited it to a nomadic lifestyle. When they reached the world of the Caucasus and the Aegean, the Indo-Europeans encountered wine, the entheogen of Dionysus, who brought it with him from his birthplace in the mythical Nysa, when he returned to claim his Olympian birthright. The Indo-European proto-Greeks "recognized it as the entheogen of Zeus, and their own traditions of shamanism, the Amanita and the 'pressed juice' of Soma — but better since no longer unpredictable and wild, the way it was found among the Hyperboreans: as befit their own assimilation of agrarian modes of life, the entheogen was now cultivable" (Ruck and Staples). Robert Graves, in his foreword to The Greek Myths, argues that the ambrosia of various pre-Hellenic tribes were amanita and possibly panaeolus mushrooms.

Amanita was divine food, according to Ruck and Staples, not something to be indulged in or sampled lightly, not something to be profaned. It was the food of the gods, their ambrosia, and it mediated between the two realms. It is said that Tantalus's crime was inviting commoners to share his ambrosia.

The entheogen is believed to offer godlike powers in many traditional tales, including immortality. The failure of Gilgamesh in retrieving the plant of immortality from beneath the waters teaches that the blissful state cannot be taken by force or guile: when Gilgamesh lay on the bank, exhausted from his heroic effort, the serpent came and ate the plant.

Another attempt at subverting the natural order is told in a (according to some) strangely metamorphosed myth, in which natural roles have been reversed to suit the Hellenic world-view. The Alexandrian Apollodorus relates how Gaia (spelled "Ge" in the following passage), Mother Earth herself, has supported the Titans in their battle with the Olympian intruders. The Giants have been defeated:

"When Ge learned of this, she sought a drug that would prevent their destruction even by mortal hands. But Zeus barred the appearance of Eos (the Dawn), Selene (the Moon), and Helios (the Sun), and chopped up the drug himself before Ge could find it."

Judaism and Christianity

According to some scholars,[7] cannabis was an ingredient of holy anointing oil mentioned in various sacred Hebrew texts. The herb of interest is most commonly known as kaneh-bosm (Hebrew: קְנֵה-בֹשֶׂם). This is mentioned several times in the Old Testament as a bartering material, incense, and an ingredient in holy anointing oil used by the high priest of the temple. Although Chris Bennett's research in this area focuses on cannabis, he mentions evidence suggesting use of additional visionary plants such as henbane, as well[8].

The Septuagint translates kaneh-bosm as calamus, and this translation has been propagated unchanged to most later translations of the old testament. However, Polish anthropologist Sula Benet published etymological arguments that the Aramaic word for hemp can be read as kannabos and appears to be a cognate to the modern word 'cannabis',[9] with the root kan meaning reed or hemp and bosm meaning fragrant. Both cannabis and calamus are fragrant, reedlike plants containing psychotropic compounds.

Although some scholars, particularly philologist John Marco Allegro, have suggested that the self-revelation and healing abilities attributed to the figure of Jesus may have been associated with a drug, there is only conjectural evidence which is dependent on interpretation, and little or no academic support, for associating Jesus with visionary plants. The ecstatic experiences of some Christian hermits and mystics could possibly have involved the use of entheogens, in conjunction with fasting[10].

Allegro's book, The Sacred Mushroom and the Cross, relates the development of language to the development of myths, religions and cultic practices in world cultures. Allegro believed he could prove, through etymology, that the roots of Christianity, as of many other religions, lay in fertility cults; and that cultic practices, such as ingesting visionary plants (or "hallucinogenic drugs") to perceive the mind of god, persisted into the early Christian era, and to some unspecified extent into the 1200s, as he argues based on interpreting the Plaincourault chapel's fresco as depicting the use of Amanita.

The historical picture portrayed by Carl Ruck and other authors associated with Entheos journal is of fairly widespread use of visionary plants in primitive Christianity and the surrounding culture, with a gradual reduction of use of entheogens in Christianity[11]. These entheogen scholars have found and published many instances of visionary plant depictions in Christian art. R. Gordon Wasson's book Soma prints a letter from art historian Erwin Panofsky asserting that art scholars are aware of many 'mushroom trees' in Christian art[12].

The question of the extent of visionary plant use throughout the history of Christian practice has barely been considered yet by academic or independent scholars. The question of whether visionary plants were used in primitive Christianity is distinct from evidence that indicates the extent to which visionary plants were used in later Christianity, including so-called "heretical" or "quasi-" Christian groups[13], and the question of other groups such as elites or laity within "orthodox" Catholic practice[14].

Entheogens in literature

The substance melange (spice) in Frank Herbert's Dune universe acts as both an entheogen and a geriatric medicine. Control of the supply of melange was crucial to the Empire, as it was necessary for, among other things, faster than light navigation.

Consumption of the imaginary mushroom anochi as the entheogen underlying the creation of Christianity is the premise of Philip K. Dick's last novel, The Transmigration of Timothy Archer, a theme which seems to be inspired by John Allegro's book.

Aldous Huxley's final novel, Island (1962), depicted a fictional entheogenic mushroom — termed "moksha medicine" — used by the people of Pala in rites of passage, such as the transition to adulthood and at the end of life.

Bruce Sterling's Holy Fire novel refers to the religion in the future as a result of entheogens, used freely by the population.

In Stephen King's The Gunslinger, Book 1 of The Dark Tower series, the main character receives guidance after taking mescaline.

The Alastair Reynolds novel Absolution Gap features a moon under the control of a religious government which uses neurological viruses to induce religious faith.


  1. ^ The Psychedelic Sacrament: Manna, Meditation, and Mystical Experience by Dan Merkur, 2001, Park Street Press.
  2. ^ Bwiti: An Ethnography of the Religious Imagination in Africa by James W. Fernandez, Princeton University Press, 1982
  3. ^ Allegro, John Marco (1970). The Sacred Mushroom and the Cross: A Study of the Nature and Origins of Christianity within the Fertility Cults of the Ancient Near East. Hodder and Stoughton. ISBN 0-340-12875-5. 
  4. ^ Benjamin Thomas Ethnobotany & Anthropology Research Page
  5. ^ Giorgio Samorini, “The ‘Mushroom-Tree’ of Plaincourault”, Eleusis: Journal of Psychoactive Plants and Compounds, n. 8, 1997, pp. 29-37
  6. ^ Giorgio Samorini, “The ‘Mushroom-Trees’ in Christian Art”, Eleusis: Journal of Psychoactive Plants and Compounds, n. 1, 1998, pp. 87-108
  7. ^ Kaplan, Aryeh. (1981). The Living Torah New York. p. 442.
  8. ^ Sex, Drugs, Violence and the Bible, by Chris Bennett and Neil McQueen, 2001, Forbidden Fruit Publishing.
  9. ^
  10. ^ The Psychedelic Sacrament: Manna, Meditation, and Mystical Experience by Dan Merkur, 2001, Park Street Press.
  11. ^ Conjuring Eden: Art and the Entheogenic Vision of Paradise, by Mark Hoffman, Carl Ruck, and Blaise Staples. Entheos: The Journal of Psychedelic Spirituality, Issue No. 1, Summer, 2001
  12. ^ Wasson and Allegro on the Tree of Knowledge as Amanita, Michael S. Hoffman, Journal of Higher Criticism, 2007
  13. ^ Daturas for the Virgin, José Celdrán and Carl Ruck, Entheos: The Journal of Psychedelic Spirituality, Vol. I, Issue 2, Winter, 2002
  14. ^ The Hidden World: Survival of Pagan Shamanic Themes in European Fairytales, by Carl Ruck, Blaise Staples, Jose Alfredo Celdran, Mark Hoffman, Carolina Academic Press, 2007


Roberts, Thomas B. (editor) (2001). Psychoactive Sacramentals: Essays on Entheogens and Religion San Francisco: Council on Spiritual Practices.

Roberts, Thomas B. (2006) "Chemical Input, Religious Output—Entheogens" Chapter 10 in Where God and Science Meet: Vol. 3: The Psychology of Religious Experience Westport, CT: Praeger/Greenwood.

Roberts, Thomas, and Hruby, Paula J. (1995-2003). Religion and Psychoactive Sacraments: An Entheogen Chrestomathy [Online archive]

  • Stafford, Peter. (2003). Psychedlics. Ronin Publishing, Oakland, California. ISBN 0-914171-18-6.
  • Carl Ruck and Danny Staples, The World of Classical Myth 1994. Introductory excerpts
  • Huston Smith, Cleansing the Doors of Perception: The Religious Significance of Entheogenic Plants and Chemicals, 2000, Tarcher/Putnam, ISBN 1-58542-034-4
  • Giorgio Samorini 1995 "Traditional use of psychoactive mushrooms in Ivory Coast (Côte d'Ivoire)?" in Eleusis 1 22-27 (no current url)
  • M. Bock 2000 "Māori kava (Macropiper excelsum)" in Eleusis n.s. vol 4 (no current url)
  • Plants of the Gods: Their Sacred, Healing and Hallucinogenic Powers by Richard Evans Schultes, Albert Hofmann, Christian Ratsch - ISBN 0-89281-979-0
  • John J. McGraw, Brain & Belief: An Exploration of the Human Soul, 2004, AEGIS PRESS, ISBN 0-9747645-07
  • J.R. Hale, J.Z. de Boer, J.P. Chanton and H.A. Spiller (2003) Questioning the Delphic Oracle, 2003, Scientific American, vol 289, no 2, 67-73.
  • The Sacred Plants of our Ancestors by Christian Rätsch, published in TYR: Myth—Culture—Tradition Vol. 2, 2003–2004 - ISBN 0-9720292-1-4
  • Yadhu N. Singh, editor, Kava: From Ethnology to Pharmacology, 2004, TAYLOR & FRANCIS, ISBN 0-4153232-74

See also

Spirituality Portal
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Entheogen". A list of authors is available in Wikipedia.
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