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

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.

Thou shalt not transgress the carrying capacity

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

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

Numeracy: 1. The art of putting numbers to things, that is, assigning amounts to variables in order that practical decisions may be reach. 2. That aspect of education (beyond mere literacy) which takes account of quantitative aspects of reality.

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