Eli5: Why did civilizations such as the Pre Dorset, Thule, and Inuit not migrate south if their environments were so harsh and extreme?

Question

I read a few articles where some of these civilizations main focus was keeping warm because they were located so far north. So why would they not migrate more south?

In: 661

Answer 1

People already lived to the south, so they would have to fight them and take their land. They probably saw it as safer to remain where they are in the culture they were adapted to.