Opposed by some of the world’smost powerful states, the coalition of actors that promoted the 2017 Treaty on the Prohibition of Nuclear Weapons encountered rigid international power structures. These structures are in part maintained through the deployment of patriarchal tactics and rhetoric to suppress the perspectives and agency of those who might challenge those in a dominant position. In this way, banning nuclear weapons can be read as an act of challenging patriarchy and building space for alternative approaches to politics, including feminist and human-security-based approaches.