Just as money develops into world-money, so the commodity owner develops into a cosmopolitan. The cosmopolitan relation of men is originally only a relation of commodity owners. The commodity as such rises above all religious, political, national, and language barriers. Price is its universal language and money, its common form. But with the development of world-money as distinguished from national coin, there develops the cosmopolitanism of the commodity owner as the faith of practical reason opposed to traditional, religious, national and other prejudices which hinder the interchange of matter among mankind. As the identical gold that lands in England in the form of American eagles, turns there into sovereigns and three days later circulates in Paris in the form of Napoleons, only to emerge in Venice in a few weeks as so many ducats, retaining all the while the same value, it becomes clear to the commodity owner that nationality “is but the guinea’s stamp.” The lofty idea which he conceives of the entire world is that of a market, the _world market_.[111] 4. THE PRECIOUS METALS. The process of capitalist production first of all takes hold of the metallic circulation as of a ready, transmitted organ which, though undergoing a gradual transformation, always retains its fundamental structure. The question as to why gold and silver and not other commodities serve as money material falls outside the limits of the capitalist system. We shall, therefore, confine ourselves to summing up the most essential points. Since universal labor-time admits of quantitative differences only, the object which is to serve as its specific incarnation must be capable of representing purely quantitative differences, i. e., it must be homogeneous and uniform in quality throughout. That is the first condition a commodity must satisfy to perform the function of a measure of value. If commodities were estimated in oxen, hides, grain, etc., they would really have to be estimated in an ideal average ox, or average hide, since there are qualitative differences between an ox and an ox, grain and grain, hide and hide. On the contrary, gold and silver, as elementary substances, are always the same, and equal quantities of them represent, therefore, values of equal magnitude.[112] The other condition which a commodity that is to serve as a universal equivalent must satisfy and which follows directly from its function of representing purely quantitative differences, is that it must be capable of being divided and re-united at will, so that money of account may be represented materially as well. Gold and silver possess these properties to a superior degree.