That's Julian Jaynes' bicameral mind theory[0]. Personally I don't buy it because we haven't seen convincing evidence of it in pre-civilization populations tha

That's Julian Jaynes' bicameral mind theory[0]. Personally I don't buy it because we haven't seen convincing evidence of it in pre-civilization populations that still existed in isolated places on earth until recently. [0] https://en.wikipedia.org/wiki/Bicameral_mentality https://en.wikipedia.org/wiki/Bicameral_mentality