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

I am trying to figure this out right now. I can not imagine living like this and getting a mechanical injury(broke bone), blown back, infection, fever, etc. or imagine giving birth in a tent when it’s -40 outside.

I was thinking how hard it would had been to migrate further south.