Query: Ukrainian Soviet Socialist Republic was a founding participant of the UN.

Relevant passages:
Ukrainian Soviet Socialist Republic <=SEP=> The Ukrainian Soviet Socialist Republic ( Ukrainian SSR or UkrSSR or UkSSR ; Украї́нська Радя́нська Соціалісти́чна Респу́бліка , Украї́нська РСР Украи́нская Сове́тская Социалисти́ческая Респу́блика , Украи́нская ССР see `` Name '' section below ) , commonly referred to in English as Ukraine ( -LSB- juːˈkreɪn -RSB- Україна , tr . Ukrayina -LSB- ukrɑˈjinɑ -RSB- ) , was one of the constituent republics of the Soviet Union from its inception in 1922 to its breakup in 1991 . From 1919 -- 22 it was a sovereign state . Throughout this period Ukraine was referred to as a Soviet socialist state . It is referred to sometimes as Soviet Ukraine by some historians .   The Ukrainian SSR was a founding member of the United Nations , although it was legally represented by the All-Union state in its affairs with countries outside of the Soviet Union . Upon the Soviet Union 's dissolution and perestroika , the Ukrainian SSR was transformed into the modern nation-state and renamed itself to Ukraine , although Ukraine 's new constitution was only ratified on 28 June 1996 .   Throughout its 72-year history , the republic 's borders changed many times , with a significant portion of what is now Western Ukraine being annexed by Soviet forces in 1939 from the Republic of Poland , and the addition of Crimea in 1954 . From the start , the eastern city of Kharkiv served as the republic 's capital . However , in 1934 , the seat of government was subsequently moved to the city of Kiev , which remained the capital of newly independent Ukraine .   Geographically , the Ukrainian SSR was situated in Eastern Europe to the north of the Black Sea , bordered by the Soviet republics of Moldavia , Byelorussia , and the Russian SFSR . The Ukrainian SSR 's border with Czechoslovakia formed the Soviet Union 's western-most border point . According to the Soviet Census of 1989 the republic had a population of 51,706,746 inhabitants , which fell sharply after the breakup of the Soviet Union .

United Nations <=SEP=> The United Nations ( UN ) is an intergovernmental organization to promote international co-operation and to create and maintain international order . A replacement for the ineffective League of Nations , the organization was established on 24 October 1945 after World War II in order to prevent another such conflict . At its founding , the UN had 51 member states ; there are now 193 . The headquarters of the UN is in Manhattan , New York City , and experiences extraterritoriality . Further main offices are situated in Geneva , Nairobi , and Vienna . The organization is financed by assessed and voluntary contributions from its member states . Its objectives include maintaining international peace and security , promoting human rights , fostering social and economic development , protecting the environment , and providing humanitarian aid in cases of famine , natural disaster , and armed conflict . The UN is the largest , most familiar , most internationally represented and most powerful intergovernmental organisation in the world .   The UN Charter was drafted at a conference between April -- June 1945 in San Francisco , and was signed on 26 June 1945 at the conclusion of the conference ; this charter took effect 24 October 1945 , and the UN began operation . The UN 's mission to preserve world peace was complicated in its early decades by the Cold War between the US and Soviet Union and their respective allies . The organization participated in major actions in Korea and the Congo , as well as approving the creation of the state of Israel in 1947 . The organization 's membership grew significantly following widespread decolonization in the 1960s , and by the 1970s its budget for economic and social development programmes far outstripped its spending on peacekeeping . After the end of the Cold War , the UN took on major military and peacekeeping missions across the world with varying degrees of success .   The UN 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 ( ECOSOC ; for promoting international economic and social co-operation 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 UN Trusteeship Council ( inactive since 1994 ) . UN System agencies include the World Bank Group , the World Health Organization , the World Food Programme , UNESCO , and UNICEF . The UN 's most prominent officer is the Secretary-General , an office held by Portuguese António Guterres since 2017 . Non-governmental organizations may be granted consultative status with ECOSOC and other agencies to participate in the UN 's work .   The organization won the Nobel Peace Prize in 2001 , and a number of its officers and agencies have also been awarded the prize . Other evaluations of the UN 's effectiveness have been mixed . Some commentators believe the organization to be an important force for peace and human development , while others have called the organization ineffective , corrupt , or biased .