The world has been close to war before - but now man, who has survived all previous threats to his existence, has taken into his mortal hands the power to exterminate the entire species some seven times over.
John F. KennedyUnconditional war can no longer lead to unconditional victory. It can no longer serve to settle disputes. It can no longer concern the Great Powers alone. For a nuclear disaster, spread by wind and water and fear, could well engulf the great and the small, the rich and the poor, the committed and the uncommitted alike. Mankind must put an end to war--or war will put an end to mankind.
John F. Kennedy