Men’s violence against women occurs across all levels of society, in all communities and across cultures. While not all men perpetrate violence against women, all men can – and ideally should – be part of ending men’s violence against women. Women have been leading initiatives to address gender inequality and prevent men’s violence against women for a long time, and there is certainly room for more men to join these efforts. While there are things we can all do individually to address gender inequality, long-term collective action is required to challenge and transform the norms, structures and practices that reinforce gender inequality and lead to men’s violence against women occurring at the extraordinarily high rates it currently does. You may have ideas about what needs to be done to challenge and transform gender inequality and be seeking information on best practice approaches to help guide your work. This guide will assist you by offering strategies to help inform initiatives that address masculinities and engage men and boys in the prevention of men’s violence against women.