Research tells us that socially constructed gender norms which associate masculinity with power, violence and control can play a role in driving conflict and insecurity. Examining the reasons behind this, ‘Masculinities, conflict and peacebuilding’ aims to advance discussions about integrating a masculinities perspective into peacebuilding policy and practice. It examines existing INGO programmes that promote non-violent and gender equitable masculinities and poses key questions about how these can be further developed to challenge the gender norms which drive conflict and insecurity.