“Yet the American forces are distinctly the forces of peace. They are the guaranties of that order and tranquility in this part of the world, which is alike beneficial to us and all the other nations. Everyone knows that we covet no territory, we entertain no imperialistic designs, we harbor no enmity toward any other people. We seek no revenge, we nurse no grievances, we have inflicted no injuries, and we fear no enemies. Our ways are the ways of peace.”

1920s, Ways to Peace (1926)

1960s, The American Promise (1965)

Declaration of Sentiments, Boston Peace Conference http://fair-use.org/the-liberator/1838/09/28/declaration-of-sentiments-adopted-by-the-peace-convention#p3 (28 September 1838)

1920s, Toleration and Liberalism (1925)
Context: It is for these reasons that it seems clear that the results of the war will be lost and we shall only be entering a period of preparation for another conflict unless we can demobilize the racial antagonisms, fears, hatreds, and suspicions, and create an attitude of toleration in the public mind of the peoples of the earth. If our country is to have any position of leadership, I trust it may be in that direction, and I believe that the place where it should begin is at home. Let us cast off our hatreds. Let us candidly accept our treaties and our natural obligations of peace. We know and everyone knows that these old systems, antagonisms, and reliance on force have failed. If the world has made any progress, it has been the result of the development of other ideals. If we are to maintain and perfect our own civilization, if we are to be of any benefit to the rest of mankind, we must turn aside from the thoughts of destruction and cultivate the thoughts of construction. We can not place our main reliance upon material forces. We must reaffirm and reinforce our ancient faith in truth and justice, in charitableness and tolerance. We must make our supreme commitment to the everlasting spiritual forces of life. We must mobilize the conscience of mankind.

Memorial Day address, Arlington National Cemetery (31 May 1976) http://www.presidency.ucsb.edu/ws/index.php?pid=6071
1970s
Context: The founding of our Nation was more than a political event; it was an act of faith, a promise to Americans and to the entire world. The Declaration of Independence declared that people can govern themselves, that they can live in freedom with equal rights, that they can respect the rights of others.
In the two centuries that have passed since 1776, millions upon millions of Americans have worked and taken up arms when necessary to make that dream a reality. We can be extremely proud of what they have accomplished. Today, we are the world's oldest republic. We are at peace. Our Nation and our way of life endure. We are free.

Stated http://www.fas.org/news/iraq/1998/02/19/98021907_tpo.html on NBC's Today Show (February 19, 1998)
1990s

Architects of Peace (2000)

Twenty Year Vision for America (2004)

1990s, A Distinctly American Internationalism (November 1999)
Context: Some have tried to pose a choice between American ideals and American interests — between who we are and how we act. But the choice is false. America, by decision and destiny, promotes political freedom — and gains the most when democracy advances. America believes in free markets and free trade — and benefits most when markets are opened. America is a peaceful power — and gains the greatest dividend from democratic stability. Precisely because we have no territorial objectives, our gains are not measured in the losses of others. They are counted in the conflicts we avert, the prosperity we share and the peace we extend.