The Origin of Consciousness...Bicameral

https://nautil.us/consciousness-began-when-the-gods-stopped-speaking-235445/
Consciousness Began When the Gods Stopped Speaking: How Julian Jaynes’ famous 1970s theory is faring in the neuroscience age by Veronique Greenwood

The Origin of Consciousness in the Breakdown of the Bicameral Mind is a 1976 book by the Princeton psychologist, psychohistorian and consciousness theorist Julian Jaynes.