So cool, I just found the Julian Jaynes book on the bi-cameral mind in my search for collective consciousness and was looking for a thread here to share my amazing discovery.
I really like the perspective that once, the voices in our head were like gods to us. Can you imagine a perfect inner silence for all your life and then suddenly hearing a voice telling you to build a pyramid? That is so amazing! I'd go do it!
It also really explains to me why almost all of humanity slavishly follows the chattering of our inner dialogue. It's because this inner dialogue eventually became damaging and over the last 3000 years we have developed a new plane of consciousness above that, let's call it Intention-Manifestation
I also suddenly understand the message of Eve tasting from the forbidden fruit. It was probably even true that it actually was Eve (the woman) who was first to develop an understanding of right and wrong, who was first to develop a consciousness.