>>830387I don't know if you guys know a lot about the history of the Navajo and the Anasazi, but as far as I know it's generally held among anthropologists that the Navajo wiped out the Anasazi civilization in a terrible and swift genocide.
Navajo have thick skulls and most grow more teeth in more directions that non-Navajo people. And they just fleed their homeland, headed to the southwest.
Imagine you're an Anasazi living in a peaceful civilization growing trees and agriculture in the ways you always have, when a race of darker skinned people shows up in your land and starts rounding you and your people up. You didn't even know humans could grow this big and they're so brutal, teeth sprouting from their mouths all over the place. Like tusks. And they just start massacring everyone you know.
If you were somehow able to survive the genocide and observe what happened you'd see them try and fail to adopt every bit of your cultures technology, finally settling on mere subsistence gathering and raiding other tribes. What a terrible group of people.
They didn't even need to leave their ancestral homeland, some just decided to go find somewhere better but ended up desperate in a desert.