I'm going to stick my neck out then. Not scientific, not nothing...just what I have noticed from my own life and from reading a LOT.
I have found that there is a clear link between childhood sexual abuse and personality disorders.
Abusive people behave like people with personality disorders.
When I first embarked on this, I found that gaslighting, almost always came up in tandem with narcisisstic personality disorder.
That other forms of abuse tied in, always with other personality disorders, always seemed to link back to massive trauma in childhood, usually involving abandonement...whether that be physical, ie just not being there...boarding schools, disapearing, workaholic, etc...or emotionally....eg alcoholic/ depressed/ drug affected.
So abusive people, appear to have the same triats, as those with personality disorders.
There are books that say that they simply feel "entitled" to be abusive. Well that never really cut it with me. Why do they feel entitled? That's the question. Others say that they know exactly what they are doing. I have been surrounded by abusive people all my life...and I know that they have absolutely no idea that what they are doing is wrong or abnormal in any way. To them....it's just how everyone deals with life.
Sorry to go on. I've been immersed in this fo a long time, and navigating my way out is tough. It's just that most of the stuff out there doesn't go deep enough.