Producing for the market implies that the market is the source of want gratification. Our shoe-factory worker goes into the market and there he supplies his wants by exchanging, not shoes, but the wages which he has previously received in the form of money. This too is such a common everyday occurrence as seldom ever to attract attention. Yet its significance is apparent when we give it a second thought. Every one of us daily consumes a variety of goods the origins of which are remotely removed from us. A common lead pencil carries the stamp of far distant forests and mines, of complicated and costly machinery, of countless miles of rail and water transportation, and of infinite labor and toil.