Julian Jaynes origin of conciousness and the breakdown of the bicameral mind.

He theorized that a few thousand years ago humans are not truely concious, defined by the ability to self reflect.

This is backed up by literature from the past like the old testament and illiad. They did not e have a word for conciousness until much later, nor is their self reflective thought. Instead they would hear an audible voice tell them to do something and would do it.

It's backed up by skitzophrenia research and other research as well.

The reviews are often based on a misunderstanding of the book or the assumption that it's been proven wrong. There's not been a lot of research in this area since but it's definitely not been proven wrong. If anything, it's been further validated.

He stated that the left and right hemispheres of the brain did not communicate how they do today. He claims that one hemisphere would give them an audible hallucination and the other side would hear it. The voice felt outside themselves so they thought it to be god.