In an approximate way, the logic of commons has been understood for a long time, perhaps since the discovery of agriculture or the invention of private property in real estate.

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

(Technology reliability) x (Human reliability) = (System reliability)

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

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.

It takes five years for a willing person's mind to change. Have patience with yourself and others when treading in an area protected by a taboo.

The greatest folly is to accept expert statements uncritically. At the very least, we should always seek another opinion.