Sinister or Dexter Brained Society?

I have an opinion which might possibly have a scientific basis in reality or not, which I will postulate here, but please remember that this is only an idea I've been kicking around in my head for a couple years, and it would be quite difficult to prove or dis-prove.

It occured to me a while ago that our ancestors might well have reached a pinnacle of humanity equivalent to where we are now, in the distant or very distant past. I've already laid out some evidence to support the credibility of that statement, however, global changes since the last Ice Age ended, have more than likely consigned the best evidence to the sea-bed, for surely any powerful ancient civilization would have depended on sea-trade and would have had its major cities based on coastal regions or near river mouths.

My theory then is this, I propose that those civilizations were completely different in thought and deed to modern-man. That they were in fact largely left-brainers, because they did not use language in a written form. We tend to think of language as letters, given form and definition. Imagine a society where everything was orally transmitted, scared texts were memorized, becuase the words held power, and to write those words would be an evil deed as it would destroy the power of the words. I'm talking about a society in which spirituality was at the driving-force (today it's consumerism and materialism) in technological development.

Try and imagine what technology we would possess if we were such a society, as opposed to television and weapons of mass destruction. We're talking about people who would have been in touch with nature, perhaps they possessed animal kinship and telepathy, or telekinetic powers. Certainly, heavy devlopment of the left-hand side of the brain, over the right could give you a whole new mind-set! We can only imagine an advanced society as being similar to our own, but what's so good about where we're at? It seems like we've been devolving, not evolving. Yes, we have made great technological advances, but what good's having a TV, just to watch people getting murdered on it? Is that what marks us out as civilized, how good we are at killing each other?