I do not believe that most human behavior has, how to put it, “functional” (?) effects. Functional would mean if X happens to you, then Y is always the traumatic result of X.
It simply doesn’t add up.
What’s abuse in one society is normal in another society. If your society tells you having X behavior happen to you is nothing, few if any get harmed.
If your society tells you that having X behavior happen to you fucks you up for life, you need decades of therapy, and you’re never right again, guess what happens? Lots of people get fucked up for a long time, some for life, many go into therapy forever, and many have lasting damage into adulthood and claim they will never be the same after what happened. For the same Goddamned behavior that caused zero harm in the other society.
If you keep telling a kid he’s a thief even though he’s never stolen a thing, he might just start stealing. In an important sense, sadly, we are what other people have told us we are. We all want to think we are masters of our own ships, but as long as we reside in this socially embedded world, it’s probably not true. We may well be doomed to be affected by other people’s treatment of us.
We live in society with other humans in a culture. Most human behavior is culturally embedded.
I hate to sound like an SJW, but most human behavior and reactions to it, traumatic or otherwise, are “socially constructed.”
In a way, the person either chooses to not be effected by it (in a society that says it’s harmless) or chooses to be traumatized by it (in a society that says it’s very harmful). Hell, our own personalities are socially constructed.
Not only that but new research says that your personality in part depends on the humans you are around, and in that sense your personality can change throughout your life. I keep telling my clients, “There is no real you. There’s no such thing. Quit trying to find the real you. It’s bullshit.” I tell them, “You create the real you every morning when you get up.” Indeed. Who am I? I am whoever the Hell I created myself to be on this particular day. Tomorrow may be different. Perhaps I may construct myself differently tomorrow.
I’m pretty dubious on the biology of psychological stuff. Sure, some psyche stuff is biological, but a lot is just not. The vast majority of it seems to be socially constructed or created and embedded deeply in the culture and social milieu that the person lives in.