The exquisite sight, sound, and smell of wilderness is many times more powerful if it is earned through physical achievement, if it comes at the end of a long and fatiguing trip for which vigorous good health is necessary. Practically speaking, this means that no one should be able to enter a wilderness by mechanical means.

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

Thou shalt not transgress the carrying capacity

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.

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

Indeed, our particular concept of private property, which deters us from exhausting the positive resources of the earth, favors pollution.

What features of your daily life do you expect to be improved by a further increase in population?