.....

I have heard this theory before, and it seems to have validity on the surface, but I think it could only be a small part of the explanation. Why is it that other mammals, canine and feline, evolved as meat-eaters but did not experience this brain boost? Also, chimpanzees do occassionally eat meat, yet did not evolve with us?

Interestingly, the timing of this "cultural awakening" coincides with the extinction of Neandertal man. Coincidence? It seems unlikely...

...It seems very likely to me that as our ancestors traveled North-and thiers diets changed to include meats and fish--that would be a corresponding change/mutation in thier physiology.

'According to Jaynes, ancient people in the bicameral state would function in a manner similar to that of a modern-day schizophrenic. Rather than making conscious evaluations in novel or unexpected situations, the person would hallucinate a voice or "god" giving admonitory advice or commands, and obey these voices without question.'

'he made the case that the bicameral mentality was the normal state of the human mind everywhere as recently as 3000 years ago'

.... If you lived in a climate where food was not as hard to obtain, then there was more time to persue other pastimes. Marking tools to identify them might have evolved into more intricate designs and others might have thought they wanted to copy these markings.Thus crude art forms evolved. .... Maybe it was as simple as if you were stupid you got eaten and if you were bright you multiplied and survived.