Am reading a really interesting book right now: 1491. History of America pre-Columbus. Somewhat PC but not too bad.
Points out that anthropologists come up with the date the first Americans arrive based on the earliest evidence. Then they build their careers on that evidence and get all torqued when people find evidence of earlier people.
Yeah, Clovis First was a good example of the “establishment” suppressing good research. So is much of the Leaky dominated period of human ancestry. It still is risky to suggest new understandings but at least it is now possible. It took DNA research to break that one free.