I leave undecided the question whether complete mutual freedom of international commerce, such as is contemplated by the theory of Free Trade, would not serve the interests of Germany. But as long as most of the countries with which our trade is carried on surround themselves with customs barriers...it does not seem to me justifiable, or to the economic interest of the nation, that we should allow ourselves to be restricted in the satisfaction of our financial wants by the apprehension that German products will thereby be slightly preferred to foreign ones. ... The minority of the population, which does not produce at all, but exclusively consumes, will apparently be injured by a customs system favouring the entire national production. Yet if by means of such a system the aggregate sum of the values produced in the country increase, and thus the national wealth be on the whole enhanced, the non-producing parts of the population...will eventually be benefited.