World Order Quotes
This statement was made after he had led the Muslim Ottoman Turkish Army to success in capturing Constantinople—Byzantium, Istanbul—bringing the Byzantine Empire (Eastern Roman Empire) to an end. He had his sights set on the Western Roman Empire next which was the remainder of what they knew of as the world then.
He used the “united nations” as a general description as the UN had not been created or named yet, However, as this quotation demonstrates, the President was already thinking about a UN idea, but as a realist, he explained that the great powers had to come to some agreement of interests. Actually China and France, at the time, would go along with whatever the United States and Britain wanted to do and had a great common interest, and there was already a strong association of interests between Britain and America. Russia was to be the problem and a complete common interest was never to be, but there was enough to get the United Nations started.
This appears to be the first American expression of the balance of power doctrine in foreign policy.