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

Why are ecologists and environmentalists so feared and hated? This is because in part what they have to say is new to the general public, and the new….

Every measured thing is part of a web of variables more richly interconnected than we know..

A coldly rationalist individualist can deny that he has any obligation to make sacrifices for the future..

Ecological differentiation is the necessary condition for coexistence..

Society does not need more children; but it does need more loved children. Quite literally, we cannot afford unloved children - but we pay heavily fo….

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

In a competitive world of limited resources, total freedom of individual action is intolerable.

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..

A technical solution may be defined as one that requires a change only in the techniques of the natural sciences, demanding little or nothing in the ….

Value is a relative concept: the value of each action is determined by comparing it with other possible actions..

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

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

Never globalize a problem if it can possibly be dealt with locally..

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

The only kind of coercion I recommend is mutual coercion, mutually agreed upon by the majority of the people affected..

You cannot do only one thing..

The essence of dramatic tragedy is not unhappiness. It resides in the solemnity of the remorseless working of things..

Freedom in a commons brings ruin to all..

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

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..