FlyingSquid OP , 2 months ago

There is no “believed” about it, and there is a lot of developmental history, so I don’t know why you’re saying that.

For example, there’s Tiwanaku. There are many sites preceding it and post-dating it.

en.wikipedia.org/wiki/Tiwanaku

There were a huge number of Andean civilizations that came before the Inca and many of them had plenty of experience working stone.

en.wikipedia.org/…/Category:Andean_civilizations

The Inca were just the last in a long line of civilizations in that area.

Furthermore, carving and stacking stones doesn’t take a genius.