I am really surprised at some of the areas settled during the Neolithic area. With so few people, you would think they’d reject the less desirable areas. But no, they’re occupying the Orkney, the Shetlands, and Norway.
I think a lot of migration is driven by a desire to get clear of murderous SOBs that want to take all their stuff. Sometimes, the bad climate is worth the bother.
they had enemies to avoid which would make such sites attractive.
Probably the result of being maritime libertarians and wanting to avoid mainland despots.