The provided text offers a comprehensive exploration of Julian Jaynes's Bicameral Mind Theory, which posits that humans, as recently as 3,000 years ago, lacked modern introspective consciousness. Jaynes argued that these ancient people possessed a "bicameral" mentality where one part of the mind generated auditory hallucinations perceived as the commands of gods or ancestors, and the other part passively obeyed. The source meticulously outlines the theory's core concepts, including the proposed neurological mechanism involving the right and left hemispheres, and the role of language and metaphor in creating the modern "analog I" and inner mind-space that replaced the voices. Furthermore, the text examines the historical and literary evidence used to support this timeline, details the causes and cultural implications of the bicameral breakdown, and discusses the ongoing scholarly critiques, defenses, and modern extensions of the hypothesis, particularly in neuroscience and artificial intelligence.
