_The Requisites of Production._--If we start with nothing but the earth in its natural state, inhabited by empty-handed men, and seek to know what is necessary in order that some wealth may be created, we find that nothing is absolutely necessary except labor. By working for a few minutes it is possible to get something that will minister directly to wants. Yet if men begin operations in a state of such poverty that they have only their bare hands to apply to the elements about them, they do not commonly get the usable goods immediately. If a savage wants fish and makes the rudest net with which to catch them, he makes what is a _capital good_. This is wanted only for the sake of the consumers' wealth which it will help to produce. The end in view has all the while been fish; but the man works first on an instrument for catching them. He makes the net by mere labor, but he catches the fish by means of labor and the net. Without such instruments to aid in production a dense population could not live at all, and a very sparse one could live only in a meager and precarious way. If the instruments are artificially made, or if they are furnished by nature in limited amounts, they are forms of wealth, or goods; but as their function is not to minister directly to consumers' wants, but to help in making things which do this, we distinguish them by the name "producers' goods" or "capital goods." In contrast with them those commodities which directly minister to wants may be called "consumers' goods." _The Production of Intermediate Goods._--All economic goods are means to an end. Wealth is always mediate. It is usually a connecting link between man's labor and the satisfaction of his wants. Man, the worker, first spends himself on nature, and then nature in turn spends itself on him. In production nature is the recipient, but in consumption the recipient is man. This is saying that man serves himself by means of some element in nature which, under his manipulation, becomes a form of wealth. He thrusts a bit of natural matter between himself as a producer and himself as a consumer. All kinds of wealth, then, stand in an intermediate position between original labor and the gratification that ultimately results from it. Some goods, however, are means in the special sense of standing between labor and other goods. Instruments help to make consumers' goods and these add to man's pleasure. Using a tool is not generally agreeable. The tool stands not only between the effort and the gratification that will ultimately follow, but between the effort and the further material good that will directly produce gratification. The hatchet intervenes between the labor that makes it and the firewood it will cut, while the wood acts directly on the man and keeps him warm. Capital goods are in this special sense mediate. They are not wanted for their own sake, but for the sake of something else that is directly useful.[7]