Excerpts from Books and Wikipedia
"Most important of all was the willingness of national governments to create a new system of international order, and to endow it with the peacekeeping authority so tragically denied to the defunct League. Meeting in San Francisco in April 1945—in the state where ‘Abdu’l Bahá had prophetically declared, 'May the first flag of international peace be upraised in this state'—delegates of fifty nations adopted the Charter of the United Nations Organization, the name proposed for it by President Franklin D. Roosevelt. Ratification by the required number of member nations followed that October, and the first General Assembly of the new organization convened on 10 January 1946, in London. In October 1949, the cornerstone of the United Nations’ permanent seat was laid in New York City, hailed by ‘Abdu’l Bahá thirty-seven years earlier as the “City of the Covenant”. During His visit there He had predicted: 'There is no doubt that . . . the banner of international agreement will be unfurled here to spread onward and outward among all the nations of the world.'" [Century of Light, p. 71-2]