A conceptualization of gendered interpersonal aggression that is grounded in the social ecological framework is presented to explicate factors in adolescents' gendered environments that give rise to aggression and victimization. The focus is on gendered social structures and social networks. Our framework for prevention suggests that violence prevention requires that we move our culture from one that continually recreates gendered structures that reinforce power and authority as masculine and that confer opportunities and constraints in ways that favor men over women. It will require deliberate action to legitimize the feminine in our culture and develop laws and practices that abolish gender inequities.