“What is the next great lesson of the war? It is that if Britain has to be thoroughly equipped to meet any emergencies of either war or peace it must take a more constant and a more intelligent interest in the health and fitness of the people. … I solemnly warn my fellow-countrymen that you cannot maintain an A1 Empire with a C3 population. (Cheers.) Unless this lesson is learned the war is in vain. Remember that the health of the people is the secret of national efficiency and national recuperation.”

1860s, Fourth of July Address to Congress (1861)
Context: Our popular Government has often been called an experiment. Two points in it our people have already settled — the successful establishing and the successful administering of it. One still remains — its successful maintenance against a formidable internal attempt to overthrow it. It is now for them to demonstrate to the world that those who can fairly carry an election can also suppress a rebellion; that ballots are the rightful and peaceful successors of bullets, and that when ballots have fairly and constitutionally decided there can be no successful appeal back to bullets; that there can be no successful appeal except to ballots themselves at succeeding elections. Such will be a great lesson of peace, teaching men that what they can not take by an election neither can they take it by a war; teaching all the folly of being the beginners of a war.

2000s, Where the Right Went Wrong (2004)

Speaking in Carnegie Hall, New York City, on 4 April 1919.

Context: As a soldier who has spent a quarter of his life in the study of the science of arms, let me tell you I went into the British Army believing that if you want peace you must prepare for war. I believe now that if you prepare thoroughly and efficiently for war, you get war.

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.

Extract from his 1922 election address, quoted in T.W. Walding (ed.), Who's Who in the New Parliament:Members and their pledges (Philip Gee, London, 1922), p. 35
1920s

Speech to the Classical Association (8 January 1926), quoted in On England, and Other Addresses (1926), p. 107.
1926
Context: Believing as I do that much of the civilisation and culture of the world is bound up with the life of Western Europe, it is good for us to remember that we Western Europeans have been in historical times members together of a great Empire, and that we share in common, though in differing degrees, language, law, and tradition. That there should be wars between nations who learned their first lessons in citizenship from the same mother seems to me fratricidal insanity.

Speaking in Carnegie Hall, New York City, on 4 April 1919.
[New York Times, 5 April 1919, 13, Maurice Criticises Peace Conferees, http://query.nytimes.com/gst/abstract.html?res=9B00E6DC1E3BEE3ABC4D53DFB2668382609EDE]

Source: The Blue Book of Freedom: Ending Famine, Poverty, Democide, and War (2007), p. 14