>>People often wonder where the cultural explosion came from. It seems
>>art, and advanced tools, and richer language and cultures seemed to pop
>>up out of nowhere at the same time tens of thousands of years ago.
>
>Yo Mike. Check out Guns, Germs and Steel. http://www.amazon.com/exec/obidos/tg/detail/-/0393317552/

Thanks, someone else has pointed that out to me.

To be honest, I'm not all that familiar with the problem, I don't even know if the way I explained it to Jim is all that valid historically. But its interesting to read into and talk about.