“What can we do? We can do much! We can inject the voice of reason into world affairs. We can mobilise all the spiritual, all the moral, all the political strength of Asia and Africa on the side of peace. Yes, we! We, the peoples of Asia and Africa, 1,400,000,000 strong, far more than half the human population of the world, we can mobilise what I have called the Moral Violence of Nations in favour of peace. We can demonstrate to the minority of the world which lives on the other continents that we, the majority are for peace, not for war, and that whatever strength we have will always be thrown on to the side of peace.”

"Maybe Not"
You Are Free (2003)
Context: We all do what we can
So we can do just one more thing
We can all be free
Maybe not in words
Maybe not with a look
But with your mind.

Debating Linus Pauling, in The Nuclear Bomb Tests...Is Fallout Overrated? : Fallout and Disarmament KQED-TV, San Francisco (20 February 1958) http://osulibrary.oregonstate.edu/specialcollections/coll/pauling/peace/papers/1958p2.1.html
Context: If we stay strong, then I believe we can stabilize the world and have peace based on force. Now, peace based on force is not as good as peace based on agreement, but in the terrible world in which we live, in the world where the Russians have enslaved many millions of human beings, in the world where they have killed men, I think that for the time being the only peace we can have is the peace based on force. Furthermore, I do not think that this peace based on force is, can be, or should be, an ultimate end. Our ultimate end must be precisely what Dr. Pauling says, peace based on agreement, on understanding, on universally agreed and enforced law. I think this is a wonderful idea, but peace based on force buys the necessary time, and in this time we can work for better understanding, for closer collaboration, first with the countries which are closest to us, which we understand better, our allies, the western countries, the NATO countries, which believe in human liberties as we do. Then, as soon as possible, with the rest of the free world, and eventually, I hope, with the whole world, including Russia, even though it may take many years to come.

To Senator Ted Kennedy
Quoted in The Namibian newspaper, 27 Apr 2011 http://www.namibian.com.na/index.php?id=28&tx_ttnews%5Btt_news%5D=80921&no_cache=1

Ian Smith - A Bit Of A Rebel, Ian Smith

Speech in Saarbrücken (9 October 1938), quoted in The Times (26 September 1939), p. 10
1930s

2009, Nobel Prize acceptance speech (December 2009)
Context: We can acknowledge that oppression will always be with us, and still strive for justice. We can admit the intractability of deprivation, and still strive for dignity. Clear-eyed, we can understand that there will be war, and still strive for peace. We can do that — for that is the story of human progress; that's the hope of all the world; and at this moment of challenge, that must be our work here on Earth.

Source: The Bean Trees

Ethiopia-Eritrea peace talks ‘providential’ https://www.vaticannews.va/en/church/news/2018-07/ethiopia-eritrea-peace-talks-franzelli.html (17 July 2018)

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.