The UN Sustainable Development Goal (SDG) 16 promotes peaceful and inclusive societies and endorses accountable and inclusive institutions at all levels. This Perspective offers ideas on a roadmap for implementing SDG 16 that will be relevant for this year’s UN’s High-Level Political Forum. In line with the topic for the upcoming UN discussions to leave no one behind, the author suggests focusing on the poorest and most conflict-affected countries, such as the g7+ and other least developed countries. The UN, according to the author, can support government-to-government and society-to-society collaboration, convene global partnerships and identify norm and implementation entrepreneurs.