africaHow does the development of civilization in eastern Africa and southern Africa compare contrast
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Civilization didn't start until about 12,000 years ago so it makes no sense to connect the rise of civilization to the rise of humanity in general, which happened around 200,000 years ago.
One major contrast is that East African civilization was influenced to a large extent by trade with other areas. East African civilizations were able to trade much more easily with Northern Africa, with the Middle East, and even with places like Indonesia and China. This was not the case with Southern Africa.
I remember reading the relevant chapter on Africa in the brilliant Guns, Germs and Steel, which suggested that geography was one of the reasons behind the success of the early Bantu civilisation. As #3 suggests, the fact that E. Africa is situated in the middle gave it a distinct advantage in history, as the tribes that originated from there had room to expand and also increased trade opportunities.