If only two things can limit the universal market, and if there never has been and never can be any lack on the part of some men of Desires which the efforts of other men can satisfy through exchange, can there ever be any lack in the second element of a market, namely, in Return-services? It is not meant to be asserted, that there are not definite limitations at any one time or place, or in the whole world at any given period, in the capacities of men then and there to produce material commodities, with their knowledge of things and powers of invention; but what _is_ meant to be asserted is this, that wherever Production is most busy and universal in response to the desires of some men somewhere, _there_ will be the greatest plenty of return-services, with which to pay for the services of these "some men somewhere" offered in response to the desires of the first set of producers. Therefore, no general glut of products is possible to occur. The more and the more _kinds_ of commodities produced anywhere, the better market _that_ for the more and the more kinds of commodities produced somewhere else. The nearer Industry may seem to be about to come to the goal of a limit, the farther off from that goal it is in reality. The aggregate of human industrial powers has indeed a potential limit at any one moment, but the knowledge of things and the power of invention and the means of transportation are enlarging every moment of time; so that, that potential limit never can become an actual limitation. Human industry will go on enlarging and diversifying itself so long as the world shall stand. Let us put this vastly important argument in other and briefer words: the Desires of men which the Efforts of other men can satisfy through exchange are unlimited in number and indefinite in degree; and therefore, mutual industrial efforts can continue to be put forth in exchange, until these unlimited and indefinite desires of all men are all met,--a goal which clearly never can be reached. This proposition demolishes at a stroke the fallacy, that pervades Dr. Chalmers' book but just now alluded to; and, what is more to the present point, demolishes equally fallacies current and prevalent in the United States at this hour. What our national industries need and all they need, what they always needed and all they ever will need, is a quick market for their products; products in market is the only market for products; but the United States for 30 years past has been putting vast obstacles in the shape of formidable taxation in the way of the presence of products from abroad in our domestic market, and consequently and inexorably the market for domestic products has been lost in foreign countries, to the immense and irreparable damage of domestic producers as well as to the foreign producers themselves.