Economists (and others) who are satisfied with nature-free equations develop a dangerous hubris about the potency of our species

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.

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 way of change in human values or ideas of morality.

Thou shalt not transgress the carrying capacity

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

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.