The United Nations is the main institute of the Yalta — Potsdam system of International Relations

The article provides a thorough analysis of the documentary materials of the important international conference in Yalta (1945), which determined the world order for decades to come and created the main institution of the Yalta system — the United Nations. The conference managed to make a final decision on many key issues regarding the structure, organs, main goals and principles of the Organization. The Yalta Conference (1945) also managed to resolve a number of controversial fundamental issues: these are the issues of primary membership in the UN and the composition and voting procedure in the UN Security Council (the right of "veto"). The author provide s interesting information about the particularly heated discussions that unfolded over the admission of four state entities to the founding states of the UN: Poland, where World War II began and where the composition of the new Polish government was not fi nally formed, and the new borders of the Polish state were not determined; Argentina, which remained formally neutral during World War II, but where a pro-fascist government came to power in 1943, and only in 1945 Argentina was one of the last countries to declare war on Nazi Germany; as well as two Soviet republics — the Ukrainian SSR and the Byelorussian SSR — whose international status was adjusted in 1944 in accordance with the amendments to the USSR Constitution of 1936, and which made a huge contribution to the Victory in World War II. The author especially emphasizes how the leaders of the "Big Three" — Stalin, Roosevelt and Churchill — sought a compromise in solving the most complex world problems, and as a result found a reasonable solution in the interests of a future global world order without wars. The author convincingly showed how fi rmly and consistently the USSR defended its position on recognizing the leading role of the Soviet state in the world. The author particularly emphasizes that the Yalta system has not disappeared completely, that the world lives according to the patterns of the Yalta system, and that it retains its explosive force in the form of international regional conflicts, which are currently multifactorial in nature. The important historical significance of the Yalta Conference (1945) is that it created the United Nations — the central global organization for international security and peacekeeping, which has existed for 80 years.