“The time has come for an all-out world war against poverty. The rich nations must use their vast resources of wealth to develop the underdeveloped, school the unschooled, and feed the unfed. Ultimately a great nation is a compassionate nation. No individual or nation can be great if it does not have a concern for "the least of these".”

1880s, Personal Memoirs of General U. S. Grant (1885)
Context: The war has made us a nation of great power and intelligence. We have but little to do to preserve peace, happiness and prosperity at home, and the respect of other nations. Our experience ought to teach us the necessity of the first; our power secures the latter.

Address at a meeting of the Berkeley Lyceum, New York, November 23, 1900. Quoted in Mark Twain's Speeches (1910), ed. William Dean Howells, p. 146 http://books.google.com/books?id=7etXZ5Q17ngC&pg=PA146 (The speech is titled "Public Education Association" in that book, but also referred to elsewhere as his "I am a Boxer" speech.)

Source: Democracy in America, Volume I (1835), Chapter XV-IXX, Chapter XVIII.

Official statement as Minister of the Blockade (31 August 1917)
Context: The great difficulty of all schemes for leagues of nations and the like has been to find an effective sanction against nations determined to break the peace.
I will not now discuss at length the difficulties of joint armed action, but every one who has studied the question knows they are very great. It may be, however, that a league of nations, properly furnished with machinery to enforce the financial, commercial, and economic isolation of any nation determined to force its will upon the world by mere violence, would be a real safeguard for the peace of the world. In any case that is a subject that may well be studied by those sincerely anxious to put an end to the present system of International anarchy.

"The Commercial Motive" ibid.

1 https://en.vogue.me/culture/the-most-inspirational-quotes-from-the-late-sheikh-zayed/, 3 https://www.goodreads.com/author/quotes/9827319.Sheikh_Zayed_Al_Nahyan

Speech to a joint session of the Dail and the Seanad, Dublin, Ireland (28 June 1963)
1963

Berkeley, CA http://www.trsite.org/content/pages/speaking-loudly (1911) <br class="br">1910s

Recalling his thoughts of July 1914 on the prospect of war with Germany.
Twenty-five Years (1925)
Context: A great European war under modern conditions would be a catastrophe for which previous wars afforded no precedent. In old days nations could collect only portions of their men and resources at a time and dribble them out by degrees. Under modern conditions whole nations could be mobilized at once and their whole life-blood and resources poured out in a torrent. Instead of a few hundreds of thousands of men meeting each other in war, millions would now meet, and modern weapons would multiply manifold the power of destruction. The financial strain and the expenditure of wealth would be incredible. I thought this must be obvious to everyone else, as it seemed obvious to me; and that, if once it became apparent that we were on the edge, all the Great Powers would call a halt and recoil from the abyss.