I'm not saying that to be snarky, I would generally love to know. I live in a moderately cold climate (England) and I often wonder how people here survived through the winter before the comforts of modern technology. And England's not that cold - how the hell did indigenous Canadians do it, for example? Did people just shiver by a fire for months at a time?
EDIT: I didn't think I was being snarky in my original final sentence, but to avoid misunderstandings I've removed it.