“A war today or tomorrow, if it led to nuclear war, would not be like any war in history.”
1963, Limited Nuclear Test Ban Treaty speech
Context: A war today or tomorrow, if it led to nuclear war, would not be like any war in history. A full-scale nuclear exchange, lasting less than 60 minutes, with the weapons now in existence, could wipe out more than 300 million Americans, Europeans, and Russians, as well as untold numbers elsewhere. And the survivors, as Chairman Khrushchev warned the Communist Chinese, "the survivors would envy the dead." For they would inherit a world so devastated by explosions and poison and fire that today we cannot even conceive of its horrors. So let us try to turn the world away from war. Let us make the most of this opportunity, and every opportunity, to reduce tension, to slow down the perilous nuclear arms race, and to check the world's slide toward final annihilation.
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John F. Kennedy 469
35th president of the United States of America 1917–1963Related quotes

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http://video.msnbc.msn.com/martin-bashir/49482269#49482269
2012-11-07

The Guardian (14 August 1981).
1980s

“It is madness for any country to build its policy with an eye to nuclear war.”
As quoted in Indefensible Weapons : The Political and Psychological Case Against Nuclearism (1992) by Robert Jay Lifton and Richard A. Falk, p. 224

A Prescription for Hope (1985)
Context: The hope of a benevolent civilization was shattered in the blood-soaked trenches of the First World War. The "war to end all wars" claimed sixteen million lives, and left embers which kindled an even more catastrophic conflagration.
Over the sorry course of 5,000 years of endless conflicts, some limits had been set on human savagery. Moral safeguards proscribed killing unarmed civilians and health workers, poisoning drinking waters, spreading infection among children and the disabled, and burning defenseless cities. But the Second World War introduced total war, unprincipled in method, unlimited in violence, and indiscriminate in victims. The ovens of Auschwitz and the atomic incineration of Hiroshima and Nagasaki inscribed a still darker chapter in the chronicle of human brutality. The prolonged agony which left 50 million dead did not provide an enduring basis for an armistice to barbarism. On the contrary, arsenals soon burgeoned with genocidal weapons equivalent to many thousands of World War II's.
The advent of the nuclear age posed an unprecedented question: not whether war would exact yet more lives but whether war would preclude human existence altogether.

Meta-Geopolitics of Outer Space - (2012) p.285

Prime Minister's Questions (15 June 1982) http://www.margaretthatcher.org/document/104968
First term as Prime Minister

“This war, like the next war, is a war to end war.”
Statement, sometimes dated to have been made in 1916, as quoted in Reading, Writing and Remembering : A Literary Record (1932) by Edward Verrall Lucas, p. 296
Undated

I say, "No. The probability, though not the certainty, but surely at least the possibility, is that no such point would come, whatever the course of the conflict."
Speech http://hansard.millbanksystems.com/commons/1967/mar/06/defence-army-estimates-1967-68-vote-a in the House of Commons (1 March 1967)
1960s