Wheels are often regarded as the oldest and most important invention of human beings, so that we often compare it with the use of fire. In fact, the history of humans taming the fire has exceeded 1.5 million years, and the use of wheels has only covered six thousand years.
Before mastering sharp and sturdy tools, it is impossible for humans to have wheeled vehicles. Using stone tools makes it difficult to machine the wood into a suitable cylindrical shape, let alone to a wheel with spokes. Therefore, the appearance of wheels can only be after the Bronze Age.
The famous American anthropologist Robert Ruwit once asserted that all peoples who use wheeled vehicles learn directly and indirectly from Cuban Bulun. The Indians of the Americas knew that towing a boat on a log, using a spinning wheel, and a hoops game, but the idea of a wheeled car never came to mind.
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