They'll be no learning period with nuclear weapons. Make one mistake and you're going to destroy nations.

All the evidence of history suggests that man is indeed a rational animal, but with a near infinite capacity for folly. . . . He draws blueprints for Utopia, but never quite gets it built. In the end he plugs away obstinately with the only building material really ever at hand--his own part comic, part tragic, part cussed, but part glorious nature.

I like to run down to the beach and have a little swim in the nude in the morning.

If we'd lost the war, we'd all have been prosecuted as war criminals. And I think he's right. He, and I'd say I, were behaving as war criminals.

Rationality will not save us.

Action should be founded on contemplation, and those of us who act don't put enough time, don't give enough emphasis, to contemplation.

Short of nuclear war itself, population growth is the gravest issue the world faces. If we do not act, the problem will be solved by famine, riots, insurrection and war.