This article examines the concept of peacebuilding in multicultural societies and underscores the significance of managing diversity for sustainable peace. Multiculturalism, characterized by the coexistence of diverse ethnicities, religions, languages, and cultures, enriches societies but also poses challenges to peace and harmony. The paper delineates key strategies for managing diversity effectively, including the promotion of inclusive policies, dialogue and reconciliation, education and awareness, conflict resolution mechanisms, and economic empowerment. Drawing upon examples from diverse contexts such as Canada, South Africa, Norway, Malaysia, and Rwanda, the article underscores the importance of a comprehensive approach to peacebuilding that addresses the complexities of multiculturalism. By managing diversity adeptly, societies can foster sustainable peace, social cohesion, and inclusive development.