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I mean, who hasn’t carved and stacked ten-ton rocks into perfect form-fitting shape? Heck when i was but a wee lad, me and the boys would knock out fifty or sixty a day, down at ye olde Quarry ‘n Carry. Build huge town walls and knock ‘em down a week later. Then we’d invent agriculture and see who could spit the farthest.

To this person's credit, the rate that the Inca developed advanced stone masonry techniques is considered a bit of a mystery. It's believed that they got them from another culture. That also had very advanced masonry techniques. The mysterious part of it is that both cultures don't have any developmental history.