The main aims of the chapter are to discuss international organisations in world politics, regional co-operation in Europe, the development of the Baltic interstate and nongovernmental institutions, and their role in the building of regional consciousness. The main problematic issues are such aspects as interstate relations in the Baltic Sea Region in regards to enhancing interstate and non-governmental co-operation in the Baltic Sea Region, civil society potential for regional consciousness building, regional identity projects, civic activism, culture diplomacy, youth projects, digitisation, civil society potential and regional integration.