Whereas most previous studies on social norms have focused on people’s perception of relevant others’ beliefs and behaviours, the role of emotional social influence in conflict resolution has thus far been less studied. Addressing this gap, the proposed project examines the role of emotion norms in shaping support for conflict-related policies across multiple conflict-affected societies. We will address three key research questions. First, we will examine how emotion norms relate to personal emotions and support for conflict-related policies, and whether they affect policy attitudes over and above the impact of personal emotions and other types of social norms. Second, we will examine how emotion norms develop over time and how they are affected by conflict-related events. Third, we will test whether changing people’s perception of emotion norms can influence personal emotions and foster support for constructive conflict-related policies. We will address these questions with a comparative research design in eleven conflict affected societies, six with an ongoing conflict (Colombia, Ukraine, Ethiopia, Israel, Turkey, and India) and five in a post-conflict stage (Bosnia and Herzegovina, Kosovo, Serbia, Thailand, and Northern Ireland). We will employ correlational and experimental designs, and a quasi-experimental design drawing on temporal variation to study the prevalence, impact and causes of emotion norms with large nationally representative or diverse samples of respondents (with a total target sample of over 30’000 respondents).