"How could ancient Sumerian wheel builders have calculated the ideal shape without modern computers and software? We may never know." I don't think figuring out

"How could ancient Sumerian wheel builders have calculated the ideal shape without modern computers and software? We may never know." I don't think figuring out the shape of the wheel was ever the problem. People have been moving huge stones by rolling them over logs since the dawn of time. Figuring out that the round thingy is of more use if you pierce it in the middle and let it rotate around an axle was, I think, the tougher nut to crack.