It's common knowledge among MRA's that violence between genders is roughly equal but what most people don't know is that according to at least one expert in the field of abusive relationships, she has never seen an abusive woman change.

http://www.patriciaevans.com/books.html

p.s. It's about men changing because I have never seen a woman, who is really abusive to her mate, change.

and more than that, of all of the therapists that she's talked to, they've never seen a seriously abusive woman change either.

http://www.healthyplace.com/abuse/verbal-abuse/your-verbally-abusive-wife-what-can-you-do/#ref

My mind was blown when I read that and I'm wondering where it comes from. maybe it's because of men's innate desire to cooperate with women or women's natural in-group preference at work. whatever the cause the result is clear, and it's pretty crazy.