There are many ways to make the death rate increase.

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

General, you don't have a war plan! All you have is a kind of horrible spasm!

To this day we seem to act in the world as though we know what's right for everybody.

I want to say, and this is very important: at the end we lucked out. It was luck that prevented nuclear war. We came that close to nuclear war at the end. Rational individuals: Kennedy was rational; Khrushchev was rational; Castro was rational. Rational individuals came that close to total destruction of their societies. And that danger exists today.

Rationality will not save us.

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.