Originally Posted by whitey
clearly im not timbs but possibly if i remember correctly from some course heres some knowledge. this happend less than 50,000 years ago but explains some of what your talking about, the discovery of agriculture. which allowed him to settle and have a reliable source of food, and let him concentrate on other things. when man was a nomade and just wandering being a hunter gather, one he could not travel in very large groups because its hard to feed all of the people and two he had to primarily use most of his energy on finding his next meal.
when people settled down and started growing crops they could support larger bands of people, and the human mind started to thrive. he had more free time to do all sorts of things.
not sure if its the answer your looking for, but its part of it.