Our corporeal life is ordinarily spent on earth and within the air. The earth is almost completely the possession of someone, individual or state. It is, as the economists say, a good with a price, and a high price. The air — for now — is a non-valuable good, that is to say, with no determined or determinable price, either by the amusingly named democracy of the market or by some authority with more brute power than grace or efficiency.