The UN is the largest and most important International Organization in the world today, whose activity dates back to 1945. The main goal of the United Nations is to strengthen cooperation between nations, economic development and the maintenance of security and peace in world. It is a continuation of the League of Nations, but with a much broader and more complete structure, organization and membership.
The initiators of its creation had become the great powers of the anti-fascist coalition, the USA and Great Britain, which in point 11 of the Atlantic Charter signed on August 14, 1941 and which contained the basic principles on the new future world order, had agreed to establish "a continuous system of general security" after the war.
The Declaration of January 1, 1942, signed by the representatives of the 26 states of the anti-fascist and anti-Nazi coalition, reiterated the need to establish a lasting peace that would provide nations with the opportunity to live safely within their borders. .
The idea of creating a new universal organization and naming it "United Nations" was reconsidered at the Conference of Foreign Ministers of the United States, the former Soviet Union and Great Britain, which took place in Moscow from 19 to 30 October 1943. In the Declaration of General Security, which was later signed by China, the decision on the establishment of the International Organization of the United Nations was formulated for the first time.
While the principles, structure and functions of the organization were formulated at the Dumbarton Oaks Conference (locality near Washington), which took place from August 21 to September 29, 1944, which was attended by representatives of the United States, the former Union Soviet, Great Britain and China. The conference had developed a document called "… proposals for the establishment of the international organization of general security".
In February 1945 the Yalta Conference was held in Crimea, with the participation of Franklin Roosevelt, Stalin and Churcill. It had laid the political foundations of all post-war peace talks. At that conference it was discussed and finally agreed on the creation of the UN as an organization where large and small nations could be part.
The US had convened the San Francisco Conference, which would be attended by all states that had declared war on Nazi Germany by March 1944. The San Francisco Conference had held proceedings from April 25, 1945 to June 26, 1945. It had acknowledged the failure of the League of Nations to thwart World War II.
On June 26, 1945, the Charter of the United Nations was adopted, which entered into force on October 24, 1945. This date was proclaimed as UN International Day.