There is a reason there are no lions left in Europe, we killed them. We killed most wildlife and only recently we have tried to bring those somewhat large predators back(wolves, bears, etc).
I am pretty sure if there were polar bears in the Mediterranean, and the rest of the history remained the same, they would also be considered extinct or endangered.
All you need is a lot of humans and time and eventually all big animal threats will be eliminated.






There are places that are snowy most of the time and everything works just fine. It really isnt that bad if you are prepared and have appropriate infrastructure.