Franklin Roosevelt actually said...

I have never for an instant wavered in my belief that an agreement to insure world peace and security can be reached.

The structure of world peace cannot be the work of one man, or one party, or one Nation.

We must always bear in mind that fact, when we speak or think of international relations.

Peace can endure only so long as humanity really insists upon it, and is willing to work for it- and sacrifice for it.