However, what I have questioned, is whether this kind of trauma has always existed, but we are less capable and skilled at dealing with it, so the impact it has now is greater.

I think a lot of people realize they are in abuse after 30s mostly. I realized at the end of 20s where I was exposed to world outside. I noticed that some of the really traumatic events eventually start playing in head and stop you from making even simple decisions. Only way to deal with it is bow out of abuse you take and move to difference place also impact never goes away unless abuser dies, or you die. Mental manipulation is harder to heal, physical wounds heal and our mind forgets about event.