Whatever his flaws and shortcomings were, my father passed on a very important legacy to me. I often heard him say, "A man who hits a woman is not a man." That concept was indelibly ingrained in me. I have three sisters and Dad made it very clear that I could never hit them no matter the provocation.
I did my best to pass this principle to my sons. One of our foster care placements was a fairly troubled young girl. I let them know it was unacceptable to hit her even if she hit them first. She was aware of this and on occasion took advantage. I told them they could defend themselves but could not hit back. I'm sure there were times when this was very frustrating for them. To the best of my recollection they never crossed the line.
The government or the NFL cannot stop domestic violence. Fathers can if they tell their sons and model that it is never acceptable to strike a woman.
"The man that lays his hand on woman,
Save in the way of kindness, is a wretch
Whom 'twere gross flattery to name a coward."