How can we know that the Great Pyramids weren´t built by slaves but by paid workers?

Question

How can we know that the Great Pyramids weren´t built by slaves but by paid workers?

In: Other

Answer 1

The pyramids required thousands and thousands of workers at any given time. Prior to the invention of gunpowder you would need an army of slave drivers just to maintain order, which then defeats the purpose of unpaid labor.