" Men who want to harass someone sexually are unlikely to do it if they’re in social settings where there’s normative pressure not to do it. "

That's why the Met Police is in such a mess at the moment. While it's obviously #NotAllPolice who are abusing women, there are too many who aren't doing a thing about it. It's not going to get better until more men step up and call out their friends and colleagues every time they encounter sexism, even when it's "just" banter.