This chapter examines the features and achievements of the three most important international organisations formed by the Muslim majority countries (MMCs)—the Arab League , the Organization of the Islamic Conference (OIC ), and the Gulf Cooperation Council (GCC )—in promoting peace and development in the pursuit of human development in the member-states. The chapter suggests that Islam’s perspectives on international relations are not contradictory to contemporary international norms, and that these three international organisations and the member-states accept the UN Charter , and value sovereignty and territorial integrity of all states. These international organizations, not ‘supra-national bodies’, have achieved different levels of success. The chapter suggests that, with necessary human and natural resources and international organisations in existence, the MMCs need to have integrated approach and emulate the GCC because of its success in the areas of economic, political and security cooperation.