This is a very long winded attempt to exonerate Africans for their failure to form anything resembling a coherent civilisation. It reeks of the same kind of environmental determinism that was popularised by Jared Diamond.

All this talk about the invention of the wheel and the written language is missing the point. The cold, hard truth is that on every continent that was inhabited by humans, there arose a system of agriculture and animal domestication... All except on the African continent. These people did not manage to develop that most basic pre-requisite for civilisation. This is rather shocking when you consider that agriculture arose in both North and South America!