Originally posted by WeatherOp
Ok, let me add this. The population on the Earth has doubled or tripled over the past thousand or so years. If they didn't know how to farm the would starve, and over 64,000 years don't you think that they would have multipled too?
Your population can only increase as much as the food you have. Farming isn't going to happen until you have enough of a surplus in an area to allow you to have leisure time to experiment.
That's why fertile areas like the Nile, Tigris and Euphrates, and the Yellow river all led to the fist major civilizations (that we have records of).
With an area with enough food year round to be sedentary you'll start domesticating your plants and animals as opposed to hunting. It's a slow process but then you build a civilization. Eventually writing and such happens.
Keep in mind, while there has been rapid change in the last three centuries things developed at a slow pace until the development of the scientific method. Applying the modern pace of things to earlier times is fallacial.
Civilizations like Sumer, Babylon, and China lasted thousands of years with little change much like medieval Europe did for several hundred years. It's not hard to see why it'd take so long for literate cultures to develop out of nomads.
If you want more information take a class on biological anthropology or archeology.
Also on your comment about 'man being flawed due to changing its mind' that is the strength of humanity. If we find more evidence of what occured it is right and proper to change our mind and worldview to match with the reality.
While there might be comfort in relying on unchanging words (which change between translations but that's an issue for theologians) there should be a greater comfort in knowing that we don't know everything and that we're willing to adapt to find out more.