It is a simplification and reductionist to say that Africans invented nothing before the advent of the Caucasians when we know that necessity is the mother of invention. Africans live in a region where they adapted according to their needs within the environment.
Africans look backward today because they have been excluded from the social networks of the wealthy. They are not in the system, so the flow of resources is excluded to them. This can be seen from the simple tactic of calling Africa the dark continent. It is obvious that only those in the light can be counted and thus only those in the light can be planned for, can be catered for, can be cared for. the dark is like a black hole, you can’t fill it up, you can’t satisfy it. Referring to Africa as the dark continent is a decision to exclude it from the light where calculated decisions and maneuvers can be taken because of the simple reason that you can see what you are doing, you can see where you are going. Seeing Africa as a dark continent is a resolve not to deal with the peculiar nature of Africa but to lump it into one category, the black category, that stands for everything dark that is in the minds of those calling it dark. They project all their dark notions onto it, notions of backwardness, notions of inferiority, notions of guilt, shame, addiction, evil, fear, disease, illness, ignorance. Those who call Africa dark can only see these limiting aspects of the continent and refuse to see the white aspects, the aspects that have the characteristics that are normally found in the light, characteristics such as dignity, dedication, comradeship, loyalty, logical reasoning, confidence, joy. So I suggest that you observe the words black and white with suspicion because no one is really black and no one is really white, they are simply parables that simplify a very complex notion that if taken literally results in fanaticism.
It is fanaticism to think that a man who was born in Norway and a man born in Greece should have the same temperament or same culture or same history and now say that that history is the white history thus including them in the light and attributing all their successes as each others successes but excluding the so called black man. If the uniting factor is Christianity, the black man should be included in the white race because he too has been a Christian for centuries, if Western Education is the uniting factor the black man should not be looked at as different from the white man because Africans have been going to European and American Universities for about a century, they have had such Western schools in their domain for at least over a century.