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Humanity will... be confronted with dangers of unprecedented character unless, in due time, measures can be taken to forestall a disastrous competition in such formidable armaments and to establish an international control of the manufacture and use of the powerful materials.

Property is unstable, and youth perishes in a moment. Life itself is held in the grinning fangs of Death, Yet men delay to obtain release from the world. Alas, the conduct of mankind is surprising.

Every adult in the world has some sense that he or she might be obliterated at any time by these weapons that we have created.

The greatest threat facing humanity is a radical Islamist regime meeting up with nuclear weapons.

The combination of hatred and technology is the greatest danger threatening mankind.

The greatest tragedy in mankind's entire history may be the hijacking of morality by religion.

Wars, however frequent and destructive they may be, have never been able to kill entirely the intellectual and moral sense which raises man above the beast.

The history of humanity has, to a large extent, been one of groping blindly in the dark, fearing for the future and yet resisting the guiding hand of inspired men who would willingly lead mankind in the path of safety.