What is fear? I think you can think years about fear and what it does but I think it's a biochemical reaction to keep us alive, so it's a good thing.
But now life around us has changed, we are out of our natural environment, we have solved all of natures "inconveniences", so there is an imbalance I believe, for example, being happy all the time, if something bad happens there might be an overreaction due this imbalance. This isn't used to controlling his fear.
I think fear is a good thing but it must be accurate, otherwise me might end up fearing each other for some reason......
Anyway my answer your question is it can lead to being tamed, the individual is tamed and the collective too.
What is tamed? I believe the mind switches off, even the smartest person will change his opinion in a drone like way. Happens to all of us, it's probably an instinct to survive in the group. If there was a insane alpha male back in the day, to stay alive one might say 'sure ok', that apple is a tomato".
It happens in a similar way we can train AI or train a dog. positive (+) and (-), reward when you get something right and punishment when you get something wrong.
How to untame ourselves? :)