The only thing we can really count on in this uncertain world is human unreliability itself.

Continuity is at the heart of conservatism: ecology serves that heart.

The population problem has no technical solution; it requires a fundamental extension in morality.

The three filters [against folly] operate through these particular questions: Literacy: What are the words? Numeracy: What are the numbers? Ecolacy: And then what?

But it is no good using the tongs of reason to pull the Fundamentalists' chestnuts out of the fire of contradiction. Their real troubles lie elsewhere.

A finite world can support only a finite population; therefore, population growth must eventually equal zero.

Education can counteract the natural tendency to do the wrong thing, but the inexorable succession of generations requires that the basis for this knowledge be constantly refreshed.