Human artifacts not only include material structures and objects, such as buildings, machines, and automobiles, but they also include organizations, … - Kenneth E. Boulding

Knowledge is not something which exists and grows in the abstract. It is a function of human organisms and of social organization. Knowledge, that is to say, is always what somebody knows: the most perfect transcript of knowledge in writing is not knowledge if nobody knows it. Knowledge however grows by the receipt of meaningful information - that is, by the intake of messages by a knower which are capable of reorganising his knowledge.

There is reason for this shift of emphasis from any actual price to a hypothetical 'equilibrium' price. It is usually more interesting to know where a train is going than to know exactly where it is at any moment. The 'equilibrium' position of any price, wage, firm, industry, or system is the position toward which it is tending. The importance of equilibrium analysis, then, is that it enables us to discuss the directions of change. If a train is in New- York and its 'equilibrium' position is in Chicago, we are reasonably confident that the general direction of its motion will be westward, even if it unaccountably decides to travel north for the first hundred and fifty miles.

Another indication of the magnitude of the present transition is the fact that, as far as many statistical series related to activities of mankind are concerned, the date that divides human history into two equal parts is well within living memory.