I recently read the book mentioned by sir82 it was Guns germs and steel and was by Jared Diamond and it was an eyeopener. I often wondered about the hunter gatherer lifestyle of the aborigines in Australia....other areas had developed far more complicated farming technics, yet the aborigines continued with the same lifestyle until the continent was "discovered by europeans". They appear to have lived in isolation for 40,000 years.
The flood account puts mankind and its record of activity to about 4,000 years....so how did they get to Australia? They did not use boats....if they did they forgot how to build them again...odd. The story of the tower of babel is told to explain the language spread and movement of mankind...again they were building a tower! What happened when they moved away...they forgot everything they had learned and went back to gathering herbs and hunting? Odd.
The book offers a very good explaination for why some peoples flourished and became technical and others made do with what they had at hand as they had no other choices. It was not a matter of intelligence as some try to bring into the discussion...read the book.