“I am utterly convinced that Science and Peace will triumph over Ignorance and War, that nations will eventually unite not to destroy but to edify, and that the future will belong to those who have done the most for the sake of suffering humanity.”

Nobel Peace Prize Acceptance Speech (2012)
Context: Are we not still guilty, if to a less violent degree, of recklessness, of improvidence with regard to our future and our humanity? War is not the only arena where peace is done to death. Wherever suffering is ignored, there will be the seeds of conflict, for suffering degrades and embitters and enrages.

Address to Congress (1945)
Context: If wars in the future are to be prevented the nations must be united in their determination to keep the peace under law.
Nothing is more essential to the future peace of the world than continued cooperation of the nations which had to muster the force necessary to defeat the conspiracy of the Axis powers to dominate the world.
While these great states have a special responsibility to enforce the peace, their responsibility is based upon the obligations resting upon all states, large and small, not to use force in international relations except in the defense of law. The responsibility of the great states is to serve and not to dominate the world.

BBC television broadcast to the nation (3 November 1956), quoted in Keith Kyle, Suez (I. B. Tauris, 2011), p. 425

The Rise and Fall of the Third Reich (1960)

Public Address, Blake's Notebook c. 1810
1810s

To Albert Speer (1945), as quoted in "Defeat of Hitler: Enter the Bunker" http://www.historyplace.com/worldwar2/defeat/enter-bunker.htm (2010), The History Place
1940s

2014, Address to the United Nations (September 2014)

Address to White House Correspondents' Association, Washington, D.C. (12 February 1943)
1940s