I like to think of fear in terms of perceived danger and actual danger.
Perceived danger is a product of the imagination and is usually a fear of the future or past events that we have no control over. We can learn from the past but can't effect it, we can plan for the future but have no clue as to what the outcome will be.
Actual danger is rooted in the here and now and usually triggers a fight or flight response as biological signals are sent to ready us for immediate action to protect ourselves or run for the hills.
So one type of fear we can do something about as it's grounded in reality, the 'here and now', 'in the moment'. The other, 'imagined fear' we'd need a time machine for. Sure we can be influence by past events in the hope for a better future, but it's still only a best guess supposition and not grounded in reality. The future hasn't happened yet and the past is the past. Times change, societies change, values change.
Peace and love and all that good stuff,
Sadie