The eight-circuit model of consciousness is a holistic model originally presented as psychological philosophy (abbreviated "psy-phi") by Timothy Leary in books including Neurologic (1973) and Exo-Psychology (1977), later expanded on by Robert Anton Wilson in his books Cosmic Trigger (1977) and Prometheus Rising (1983), and by Antero Alli in his books Angel Tech (1985) and The Eight-Circuit Brain (2009), that suggests "eight periods [circuits]" within the model. The eight circuits, or eight systems or "brains", as referred by other authors, operate within the human nervous system. Each corresponds to its own imprint and subjective experience of reality. Leary and Alli include three stages for each circuit, detailing developmental points for each level of consciousness.
The model lacks scientific credibility and has largely been ignored in academia.
At the end of 1967, Leary moved from the sprawling 64-room mansion on the Hitchcock Estate in Millbrook, New York, where he and others had engaged in psychedelic research sessions, to Laguna Beach, California, and made many friends in Hollywood. "When he married his third wife, Rosemary Woodruff, in 1967, the event was directed by Ted Markland of Bonanza. All the guests were on acid."
In the late 1960s and early 1970s, Leary formulated what became his eight-circuit model of consciousness in collaboration with writer Brian Barritt. The essay "The Seven Tongues of God" claimed that human brains have seven circuits producing seven levels of consciousness. This later became seven circuits in Leary's 1973 monograph Neurologic, which he wrote while he was in prison. The eight-circuit idea was not exhaustively formulated until the publication of Exo-Psychology by Leary and Robert Anton Wilson's Cosmic Trigger in 1977. Wilson contributed to the model after befriending Leary in the early 1970s, and used it as a framework for further exposition in his book Prometheus Rising, among other works.[1]
Of the eight circuits in this model of consciousness, the first four circuits concern themselves with life on Earth, and the survival of the human species. The last four circuits are post-terrestrial, and concern themselves with the evolution of the human species as represented by so-called altered states of consciousness, enlightenment, mystical experiences, psychedelic states of mind, and psychic abilities. The proposal suggests that these altered states of consciousness are recently realized, but not widely utilized. Leary described the first four as "larval circuits", necessary for surviving and functioning in a terrestrial human society, and proposed that the post terrestrial circuits will be useful for future humans who, through a predetermined script, continue to act on their urge to migrate to outer space and live extra-terrestrially. Leary, Wilson, and Alli have written about the idea in depth, and have explored and attempted to define how each circuit operates, both in the lives of individual people and in societies and civilizations.
The term "circuit" is equated to a metaphor of the brain being computer hardware, and the wiring of the brain as circuitry.
Leary used the eight circuits along with recapitulation theory to explain the evolution of the human species, the personal development of an individual, and the biological evolution of all life.
Many researchers believed that Leary provided little scientific evidence for his claims. Even before he began working on psychedelics, he was known as a theoretician rather than a data collector. His most ambitious pre-psychedelic work was Interpersonal Diagnosis Of Personality. The reviewer for The British Medical Journal, H. J. Eysenck, wrote that Leary created a confusing and overly broad rubric for testing psychiatric conditions. "Perhaps the worst failing of the book is the omission of any kind of proof for the validity and reliability of the diagnostic system," Eysenck wrote. "It is simply not enough to say" that the accuracy of the system "can be checked by the reader" in clinical practice. In 1965, Leary co-edited The Psychedelic Reader. Penn State psychology researcher Jerome E. Singer reviewed the book and singled out Leary as the worst offender in a work containing "melanges of hucksterism". In place of scientific data about the effects of LSD, Leary used metaphors about "galaxies spinning" faster than the speed of light and a cerebral cortex "turned on to a much higher voltage".