There was no other reason, that was literally the only reason
Answer:
he Incas, an American Indian people, were originally a small tribe in the southern highlands of Peru. In less than a century, during the 1400s, they built one of the largest, most tightly controlled empires the world has ever known. ... Roads, walls, and irrigation works constructed by the Incas are still in use today.
Explanation:
The whites, the whites were enslaved by the Egyptians. So the Egyptians didn't make the pyramids.