"Twice in this century, in the aftermath of world wars which resulted in considerable measure from the shortcomings of the old diplomacy in regulating the relations of powerful States, world organizations—first the League of Nations and then the United Nations—have been set up to “save succeeding generations from the scourge of war.” This is the central function of the United Nations under the Charter. Both with the League of Nations and with the United Nations, after initial enthusiasm a great disillusionment set in, and Governments tended more and more to disregard the political functions of the international organization which they themselves had set up in the wake of war and to revert to the international practices of earlier times. In the 1930s this process led to the Second World War. I do not believe that any Government has any intention of letting us drift into a third world war, but unless we are prepared to learn from the past and to make our international political institutions work as they were intended to work, that danger will always exist. History tells us that we cannot afford to take for granted the persistence of moderation and reason in international affairs, and that international organization is necessary as a safeguard when moderation and reason fail."
January 1, 1970
https://en.wikiquote.org/wiki/League_of_Nations