But observe (for even at the risk of repetition I wish to warn the reader against a confusion of thought that is observable even in writers of great reputation), that the question of fact into which this issue resolves itself is not in what stage of population is most subsistence produced? but in what stage of population is there exhibited the greatest power of producing wealth? For the power of producing wealth in any form is the power of producing subsistence—and the consumption of wealth in any form, or of wealth-producing power, is equivalent to the consumption of subsistence. I have, for instance, some money in my pocket. With it I may buy either food or cigars or jewelry or theater tickets, and just as I expend my money do I determine labor to the production of food, of cigars, of jewelry, or of theatrical representations. A set of diamonds has a value equal to so many barrels of flour—that is to say, it takes on the average as much labor to produce the diamonds as it would to produce so much flour. If I load my wife with diamonds, it is as much an exertion of subsistence-producing power as though I had devoted so much food to purposes of ostentation. If I keep a footman, I take a possible plowman from the plow. The breeding and maintenance of a race-horse require care and labor which would suffice for the breeding and maintenance of many work-horses. The destruction of wealth involved in a general illumination or the firing of a salute is equivalent to the burning up of so much food; the keeping of a regiment of soldiers, or of a war-ship and her crew, is the diversion to unproductive uses of labor that could produce subsistence for many thousands of people. Thus the power of any population to produce the necessaries of life is not to be measured by the necessaries of life actually produced, but by the expenditure of power in all modes. There is no necessity for abstract reasoning. The question is one of simple fact. Does the relative power of producing wealth decrease with the increase of population?