I read a post about mali domesticate rice about 2000 years earlier which led to an advance civilization in the shale of west africa that ended up trading with carthage and Egypt. it eventually led to a seafaring daughter culture along the cost if west africa and moder day nigeria.
what is that civilization discovered south Africa and set up a colony and establish contact/trade with the india ocean . which in turn grew and surpass the original west african culture due to the better south african climate , lack of tropical dieses, and the tsetse fly .