Razib Khan summarizes a new paper, Estimating mobility using sparse data: Application to human genetic variation, on using new genomic data to measure migrations down through prehistory in Western Eurasia.
It turns out that there were three eras of massive migration in the post-Ice Age ancient West, each, perhaps, involving a fairly new technology:
– the invention of agriculture, which encouraged Middle Eastern farmers to invade Europe
– the rise of the Bronze Age, such as the Yamnaya (Aryan) steppe people’s invasion of Northern Europe
– and the rise of the Iron Age, which may be involved with the mysterious Sea Peoples’ attacks on the palace civilizations of the Near East during the Late Bronze Age Collapse around 1200 BC.
On the other hand, I could be wrong about the technology connections to these ages of mass migrations.
In between, people tended to settle down where they were and not feel the need so much to “Go to interesting places, meet interesting people, and kill them.”