>>1197186the Anasazi and Fremont cultures built with durable materials. We have a pretty good record of their struggles. Before they moved to cliffs and towers they lived out on the flats. One of my favorite finds was a kiva, an underground place of worship. An entire family had been dragged down into this kiva, killed, butchered, eaten, and then the cannibals shit them out on their own butchered bodies. Like they ate them and stuck around long enough to digest them and shit their digested meat on their butchered remains.
they were dealing with a particularly brutal invasion. Things did settle down eventually though.