There are so many disturbing aspects of the allegations coming out of Cornell. But as a mother who has raised three boys, I keep coming back to the group. The group chat. The number of young men allegedly involved. The hours it reportedly went on. And all the opportunities someone may have had to say, "Stop." We absolutely need to teach our sons about consent. But we also need to teach them something harder: how to stand against the group when the people doing something wrong are their own friends. Especially when belonging to that group matters desperately to them. And we have to model that for them, too. Let them see us speak up when it would be easier to stay quiet. Let them see us stand up for someone when it might cost us socially. Let them see that being a good person sometimes means disappointing, confronting or even losing people we care about. Because eventually our kids will find themselves in rooms we're not in. And I want mine to know that losing someone's ...