The present basic philosophy is nuclear deterrence.

The quest for a war-free world has a basic purpose: survival. But if in the process we learn how to achieve it by love rather than by fear, by kindness rather than by compulsion; if in the process we learn to combine the essential with the enjoyable, the expedient with the benevolent, the practical with the beautiful, this will be an extra incentive to embark on this great task.

Above all remember your humanity.

My short-term vision is the abolition of nuclear weapons. My long-term vision is the abolition of war.

But scientists on both sides of the iron curtain played a very significant role in maintaining the momentum of the nuclear arms race throughout the four decades of the Cold War.

This is the reality of nuclear weapons: they may trigger a world war; a war which, unlike previous ones, destroys all of civilization.

I did not imagine that the second half of my life would be spent on efforts to avert a mortal danger to humanity created by science.