But as population became denser, the natural chemical and biological recycling processes became overloaded, calling for a redefinition of property rights.

(Technology reliability) x (Human reliability) = (System reliability)

In a finite world this means that the per capita share of the world's goods must steadily decrease.

It takes five years for a willing person's mind to change. Have patience with yourself and others when treading in an area protected by a taboo.

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.

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.

No one should be able to enter a wilderness by mechanical means.