Education can counteract the natural tendency to do the wrong thing, but the inexorable succession of generations requires that the basis for this knowledge be constantly refreshed.

Of course, a positive growth rate might be taken as evidence that a population is below its optimum.

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

However, I think the major opposition to ecology has deeper roots than mere economics; ecology threatens widely held values so fundamental that they must be called religious.

There is nothing more dangerous than a shallow thinking compassionate person

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

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