Jared Diamond : (2)

" The rate of human invention is faster, and the rate of cultural loss is slower, in areas occupied by many competing societies with many individuals and in contact with societies elsewhere. " - Jared Diamond

" The broadest pattern of history – namely, the differences between human societies on different continents – seems to me to be attributable to differences among continental environments, and not to biological differences among peoples themselves. " - Jared Diamond