This weekend I, like many other fathers in this country, had the joy of celebrating Father’s Day with my family. As Dad to five sons, I take special pleasure in helping them to become positive forces in the world. One of the things I have tried to teach them–through my behavior, my words, and my work–is that we men have a role to play in the empowerment of women and girls. Gendered power dynamics contribute to so many of the world’s ills, from HIV/AIDS to poverty, from lack of access to health services to poor quality education. But one of the worst manifestations of gender norms is also a consistent barrier to our multibillion dollar efforts to address these other human rights challenges: violence against women and girls.