Years in related fields here.
The lost important thing is to encourage and nurture circuit breakers. In every abusive family which isn't one any more there is a circuit breaker. Either a woman who doesn't let an abusive man into her house or a man who decides the violence of his father won't be repeated in his house. And yes, there are female abusers (as in this case) but the vast majority of family violence is male in origin or partnership.
Don't make a relationship a goal for women. We are taught it's better to have any man than no man. Support single mothers, make it a great thing. Make it financially possible. Make it a celebrated thing. I can't tell you how many men go on and on about being single dads because it gets them kudos but women are supposed to be ashamed.
Support women's charities, women's businesses and women's health. Happy, healthy women with choices make better ones.
Male circuit breakers need support too. Good intervention in schools when we see issues. Throw love and support at the bullies and arseholes. Lots of male role models and stop idolising men in the media who do terrible things. You hurt someone, you don't get in the TV any more.
Housing. When people aren't forced to be in housing with each other or stay there if they're abused, it's more dangerous.
And have eyes on the kids at school who aren't OK. There was a thread about drug dealers parents on here and everyone was saying their child wouldn't be friends with the kids. Mine would. She wouldn't be at their house! But at mine the child would bewelcome.
Kids need unpaid, friendly, concerned adults.