“We are attempting to make our contribution to the peace of the world, not in any sensational or spectacular way but by the application of practical, workable, seasoned methods and an appeal to the common sense of mankind. We do not rely upon the threat of force in our international relations or in our attempt to maintain our position in the world. We have seen force tried, but the more people study its results the more they must be convinced that on the whole it has failed. Conditions sometimes arise where it seems that an appeal to arms is inevitable, but such conflicts decide very little. In the end it is necessary to make an appeal to reason, and until adjustments are reached by covenants which harmonize with the prevailing sense of justice a final solution has not been found.”

1910s, Address to Congress: Analyzing German and Austrian Peace Utterances (1918)

1960, The New Frontier
Context: For the harsh facts of the matter are that we stand on this frontier at a turning-point in history. We must prove all over again whether this nation — or any nation so conceived — can long endure — whether our society — with its freedom of choice, its breadth of opportunity, its range of alternatives — can compete with the single-minded advance of the Communist system. Can a nation organized and governed such as ours endure? That is the real question. Have we the nerve and the will? Can we carry through in an age where we will witness not only new breakthroughs in weapons of destruction — but also a race for mastery of the sky and the rain, the ocean and the tides, the far side of space and the inside of men's minds? Are we up to the task — are we equal to the challenge? Are we willing to match the Russian sacrifice of the present for the future — or must we sacrifice our future in order to enjoy the present? That is the question of the New Frontier. That is the choice our nation must make — a choice that lies not merely between two men or two parties, but between the public interest and private comfort — between national greatness and national decline — between the fresh air of progress and the stale, dank atmosphere of "normalcy" — between determined dedication and creeping mediocrity. All mankind waits upon our decision. A whole world looks to see what we will do. We cannot fail their trust, we cannot fail to try.

Nobel Peace Prize Acceptance Speech (2012)
Context: The peace of our world is indivisible. As long as negative forces are getting the better of positive forces anywhere, we are all at risk. It may be questioned whether all negative forces could ever be removed. The simple answer is: “No!” It is in human nature to contain both the positive and the negative. However, it is also within human capability to work to reinforce the positive and to minimize or neutralize the negative. Absolute peace in our world is an unattainable goal. But it is one towards which we must continue to journey, our eyes fixed on it as a traveller in a desert fixes his eyes on the one guiding star that will lead him to salvation. Even if we do not achieve perfect peace on earth, because perfect peace is not of this earth, common endeavours to gain peace will unite individuals and nations in trust and friendship and help to make our human community safer and kinder.

As quoted in "America's Next Top Fearmonger: The presidential candidates compete to scare the daylights out of the U.S. public." http://nationalinterest.org/feature/america%E2%80%99s-next-top-fearmonger-12954 (22 May 2015), by Robert Golan-Vilella, National Interest
2010s

On Behalf of the Movement of Nonaligned Countries (1979)

1920s, Ways to Peace (1926)

Michael Jordan: ‘I can no longer stay silent’ http://theundefeated.com/features/michael-jordan-i-can-no-longer-stay-silent/, The Undefeated (July 25, 2016)

A speech on “Air Power” (29 August 1941)