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

The morality of an act is a function of the state of the system at the time it is performed.

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

The god who is reputed to have created fleas to keep dogs from moping over their situation must also have created fundamentalists to keep rationalists from getting flabby. Let us be duly thankful for out blessings.

Ecology is the overall science of which economics is a minor speciality.

Society does not need more children; but it does need more loved children. Quite literally, we cannot afford unloved children - but we pay heavily for them every day. There should not be the slightest communal concern when a woman elects to destroy the life of her thousandth-of-an-ounce embryo. But all society should rise up in alarm when it hears that a baby that is not wanted is about to be born.

Moreover, the practical recommendations deduced from ecological principles threaten the vested interests of commerce; it is hardly surprising that the financial and political power created by these investments should be used sometimes to suppress environmental impact studies.