Compare and contrast the ways in which geographic isolation shaped the development of the Americas and sub-Saharan Africa as distinct from Eurasia and northern Africa . In your essay characterize in general terms the cultural, economic, and technological development of peoples in the Americas , sub-Saharan Africa, and Eurasia and northern Africa , and cover the major civilizations and events in these areas of development for these three regions of the world up to 200 B.C.E.