Finally Finished Guns, Germs, and Steal.

Geographical luck is really what you have been delt.  You can be lucky and have domesticatible animals and good crops like the Middle East or you could be like Papua, New Guinea who has nothing.  No one is smarter than one another, it's just that some people had the chance to move forward, while others did not.  Since people had to keep moving and hunt anymore, people started to make homes.  People also learned how to make plaster from limestone.  This was one of the biggest steps in technology.  This also led to the discovery of how to make medal.  New Guinea never advanced with medal because they were always to busy trying to feed themselves.  Areas with the same latitude, have the same climate, for example Europe and Asia.  Since they have the same climate, they could grow the same crops and this is why they both advanced at around the same time.  When Europe advanced enough to discover the Americas, they brought cattle and other farming animals.  This is why America now has farming animals.  New Guineans are still trying to catch up with the modern world, but unfortunately for them, there is still a big gap.  Some parts of New Guinea are making progress but it still isn't enough.  Some people think Jared Diamonds theory is to simple and easy, but I agree with it.  The fertile crescent.