Parvin, DilrubaKhan, Md. Zubair Kasem2018-11-142018-11-142015-12Volume 3; December- 2015,2311-620X (Online)2308-5096 (Print)http://dspace.iiuc.ac.bd:8080/xmlui/handle/88203/270The United Nations (UN) is an international organization whose aims are to facilitate cooperation in international law, security, economic development, social progress, human rights, and achievement of world peace. The UN was founded in 1945 after World War II to replace the League of Nations to stop wars among countries, and to provide a platform for dialogue. The organization has six principal organs: The General Assembly (the main deliberative assembly); the Security Council (for deciding certain resolutions for peace and security); the Economic and Social Council (for assisting in promoting international economic and social cooperation and development); the Secretariat (for providing studies, information, and facilities needed by the UN); the International Court of Justice (the primary judicial organ); and the United Nations Trusteeship Council. Security Council, the most important organ contains five permanent and ten non-permanent members. The five permanent members namely USA, UK, Russia, China, France possess the veto power as to the question of international peace and security. In this study it is tried to explore the rationale of emergence of new permanent member of UNO. In addition, it searches also obstacles/challenges which shall have to be faced as the permanent states are oriented with veto power and enjoying other privileges.enDistribution of PowerSecurity Council of the UNLarger FreedomArticle