A capacity of $40,000,000,000 or even of $25,000,000,000 is, therefore, not within the limits of reasonable possibility. It is for those who believe that Germany can make an annual payment amounting to hundreds of millions sterling to say _in what specific commodities_ they intend this payment to be made and _in what markets_ the goods are to be sold. Until they proceed to some degree of detail, and are able to produce some tangible argument in favor of their conclusions, they do not deserve to be believed.[131] I make three provisos only, none of which affect the force of my argument for immediate practical purposes. _First_: if the Allies were to "nurse" the trade and industry of Germany for a period of five or ten years, supplying her with large loans, and with ample shipping, food, and raw materials during that period, building up markets for her, and deliberately applying all their resources and goodwill to making her the greatest industrial nation in Europe, if not in the world, a substantially larger sum could probably be extracted thereafter; for Germany is capable of very great productivity. _Second_: whilst I estimate in terms of money, I assume that there is no revolutionary change in the purchasing power of our unit of value. If the value of gold were to sink to a half or a tenth of its present value, the real burden of a payment fixed in terms of gold would be reduced proportionately. If a sovereign comes to be worth what a shilling is worth now, then, of course, Germany can pay a larger sum than I have named, measured in gold sovereigns. _Third_: I assume that there is no revolutionary change in the yield of Nature and material to man's labor. It is not _impossible_ that the progress of science should bring within our reach methods and devices by which the whole standard of life would be raised immeasurably, and a given volume of products would represent but a portion of the human effort which it represents now. In this case all standards of "capacity" would be changed everywhere. But the fact that all things are _possible_ is no excuse for talking foolishly. It is true that in 1870 no man could have predicted Germany's capacity in 1910. We cannot expect to legislate for a generation or more. The secular changes in man's economic condition and the liability of human forecast to error are as likely to lead to mistake in one direction as in another. We cannot as reasonable men do better than base our policy on the evidence we have and adapt it to the five or ten years over which we may suppose ourselves to have some measure of prevision; and we are not at fault if we leave on one side the extreme chances of human existence and of revolutionary changes in the order of Nature or of man's relations to her. The fact that we have no adequate knowledge of Germany's capacity to pay over a long period of years is no justification (as I have heard some people claim that, it is) for the statement that she can pay $50,000,000,000.