People are the quintessential element in all technology... Once we recognize the inescapable human nexus of all technology our attitude toward the reliability problem is fundamentally changed.

Ecological differentiation is the necessary condition for coexistence.

Every plausible policy must be followed by the question 'And then what?'

The greatest folly is to accept expert statements uncritically. At the very least, we should always seek another opinion.

Ruin is the destination toward which all men rush, each pursuing his own best interest in a society that believes in the freedom of the commons.

It is a mistake to think that we can control the breeding of mankind in the long run by an appeal to conscience.

Throughout history, human exploitation of the earth has produced this progression: colonize-destroy-move on.