The ability to work with systems of general equilibrium is perhaps one of the most important skills of the economist — a skill which he shares with m… - Kenneth E. Boulding

The right to have children should be a marketable commodity, bought and traded by individuals but absolutely limited by the state.

It seems reasonable to suppose that conflict does exhibit many general patterns, that the patterns of conflict in industrial relations, international relations, interpersonal relations, and even animal life are not wholly different from one another, and that it is, therefore, worth looking for the common element. On the other hand, we should be surprised if there were no differences; the pattern of conflict in international relations, for instance, is not the same as in industrial or interpersonal relations. Just as it is important to perceive the similarities in different situations, so it is important to perceive the differences. These differences cannot be perceived, however, without a general theory to serve as a standard of comparison.

It [knowledge] is clearly related to information, which we can now measure; and an economist especially is tempted to regard knowledge as a kind of capital structure, corresponding to information as an income flow. Knowledge, that is to say, is some kind of improbable structure or stock made up essentially of patterns — that is, improbable arrangements, and the more improbable the arrangements, we might suppose, the more knowledge there is.