George, aside the fact the WHEEL was unknown in Sub-Saharan Africa until the 1500s and no evidence of a written language (as opposed to pictographs), maybe JJHack will chime in and verify his story about how he built framed wooden windows and doors for his employees' homes to keep not only the weather, but critters out. He left for the US and when he came back six months later, ALL the wood had been stripped from the frames and burned as firewood when all the had to do was walk another twn yards into the Mopane bush and get all the wood they wanted. The operative words here was the "walk ten yards"....

A good principle to guide me through life: “This is all I have come to expect, standard lackluster performance. Trust nothing, believe no one and realize it will only get worse…”