What helped the Neolithic man to make carts?
Answers
Since the wheel does not exist in nature, I’m inclined to think that it evolved as the result of problem-solving.
The mainstream view (in the field of ancient history) is that the first wheels were not used for transportation, but as potter’s wheels in bronze age Mesopotamia. It’s easy to imagine how the wheel might have evolved as a potter's tool rather than as a solution for transportation, since the potter's wheel never had to bear any axial load and deal with all the problems of that. Basically, it’s just a spinning platform. If you think about this you can imagine how problem solving can lead from someone manually rotating a piece of wood, to mounting that on a pole that passed through a hole in the bench to keep it centralized while he spun it.
It’s also not difficult to imagine how the potter’s wheel idea were adapted to use as a wheel in the first carriages and chariots of the time.
But of course, all this is always going to be speculation. The likelihood is that the wheel evolved independently in separate cultures to solve different problems. No-one knows!