Do you know of any good books or sources about this viewpoint?

When I read about history of Europe/Old World in Roman and post Roman times, it's clear that large scale movements of whole groups of people is very common in the historical record.

I wonder why such views were ever resisted in prehistory, a time when such movements were simpler and their motivations more likely to arise?

_Who We Are and How We Got Here_ by David Reich (the dean of ancient DNA studies).