There was a study can't remember where but essentially what they found is that bears and wolves who have been hunted in the past by man have passed that fear down many generations.
The wolves and bears who haven't had that interaction didn't fear man.
That's cool. I never heard of that before. I live in a city, but unfortunately I see fellow city people treat wild animals like their personal amusement. I saw a tourist try and take a selfie within 10 feet of a bison yesterday at Grand Teton National Park just outside of Moose Junction. I was rooting for the bison to trample them.