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The Origin of Consciousness in the Breakdown of the Bicameral Mind

1976 book by Julian Jaynes

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Through Behavior, Awareness and Cognition

In his book, Jaynes examines historical texts and archaeological evidence to support his theory. He places the origin of consciousness around the 2nd millennium BC and suggests that the transition from the bicameral mind to consciousness was triggered by the breakdown of the bicameral system. The bicameral mind, he explains, was characterized by individuals experiencing auditory hallucinations as commands from gods, guiding their actions.

The book gained attention and was well-received upon its release. It generated several positive book reviews, including mentions by notable critics such as John Updike and Christopher Lehmann-Haupt. The theory proposed by Jaynes influenced philosophers like Daniel Dennett and Susan Blackmore, as well as researchers studying schizophrenia. Jaynes's ideas on consciousness and the bicameral mind have been explored in various conferences, publications, and discussions over the years.

In addition to numerous reviews and commentaries, there are several summaries of the book's material, for example, in the journal Behavioral and Brain Sciences, and in lectures and discussions published in Canadian Psychology. It was Jaynes's only book, and is still in print in several languages.

Bicameral mind

In this book, Jaynes reviews what one of his early critics acknowledged as the "spectacular history of failure" to explain consciousness – "the human ability to introspect". Abandoning the assumption that consciousness is innate, Jaynes explains it instead as a learned behavior that "arises [...] from language, and specifically from metaphor." With this understanding, Jaynes then demonstrated that ancient texts and archeology can reveal a history of human mentality alongside the histories of other cultural products. His analysis of the evidence led him not only to place the origin of consciousness during the 2nd millennium BC but also to hypothesize the existence of an older non-conscious "mentality that he called the bicameral mind, referring to the brain's two hemispheres".

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