Guns, Germs and Steel

Jared Diamond's (Guns, Germs and Steel) answer to the question of why some civilizations advanced and other didn't is quite simple. His answer is geography. Some people disagree with this theory, but I stand with it. I believe geography created the have's and have not's because geography effects the climate and land. I do think that Jared Diamond has a very valid and convincing argument on why some civilizations advanced and others did not.