This project will (1) deepen the UN’s understanding of how early diplomatic action works to prevent conflict; (2) produce a sound and user-friendly framework to assess the success of preventive diplomacy; (3) provide a basis for more effective preventive diplomacy that draws on UN assets across the three UN pillars; and 4) contribute to improved planning of preventive diplomacy interventions. This project will conduct a systematic and rigorous analysis of six cases where the UN was involved in working to prevent violent conflict. The analyses will be conducted by building on and adapting a DPA-developed assessment methodology and will focus on identifying best practices and lessons learned. The main outputs will include a) a detailed narrative and in-depth evaluations of UN-led preventive diplomacy interventions in these six cases; b) a policy report synthesizing a set of lessons from the case studies covering a range of critical themes (i.e. early warning and intelligence, the challenge of sovereignty, regional and international constraints, etc.); and c) a refined assessment methodology, which, through continuous application, will ensure ongoing learning and identification of best practices within the UN and contribute to improved planning of future interventions. This in turn will ensure sustainability of the project outcomes.