Expulsion from the United Nations

During the existence of the United Nations' predecessor, the League of Nations, the Soviet Union was expelled from the organization as the initiator of the Winter War with Finland.

After the Chinese Civil War and the retreat of the government of Republic of China to Taiwan, the PRC lobbied for the exclusion of the Republic of China from the United Nations. Particularly, in 1971 the PRC through its proxies passed along a letter from its Ministry of Foreign Affairs stating that Taiwan was a part of its territory that was returned after World War II, and that Beijing would "have absolutely nothing to do with the [UN]" if it adopted a position of "'two Chinas', 'one China, one Taiwan,' or 'the status of Taiwan remaining to be determined'".^[2] This claim was reiterated again during debates in the United Nations General Assembly.^[2] At the time, it was viewed as a question of representation (of which government should represent China in the UN) rather than a question of admission of the PRC.^[3] Eventually, the Republic of China was stripped of its 26-year-long UN membership and replaced by the PRC in the United Nations Security Council. The expulsion occurred despite the fact that the Republic of China had been one of the founding members of the United Nations, with diplomatic recognition of other UN members. Nonetheless, the mention of the Republic of China rather than People's Republic of China among Security Council members in the United Nations Charter has been retained since.

After the Russian invasion of Ukraine in 2022 and adoption of General Assembly Resolution ES-11/1, the presence of Russia in the United Nations Security Council has been questioned. Although the membership of the Union of Soviet Socialist Republics, the predecessor to Russia, is enshrined in Article 23 of the United Nations Charter and its veto power cannot be revoked because of Article 27 of the Charter, some have argued that Russia could not veto a resolution proposing its expulsion under Article 6 of the Charter because Article 27 obliges members of the Security Council to abstain from voting in certain disputes to which they are a party.^[4] That provision, however, only applies to decisions of the Security Council under Chapter VI and Article 52(3) of the Charter, not to expulsions. Since Russia would presumably veto its own expulsion, the issue of any potential expulsion of Russia from the United Nations is therefore moot.^[5][6][7]