c. Exchange and Circulation. Circulation is but a certain aspect of exchange, or it may be defined as exchange considered as a whole. Since exchange is an intermediary factor between production and its dependent, distribution, on the one hand, and consumption, on the other; and since the latter appears but as a constituent of production, exchange is manifestly also a constituent part of production.
In the first place, it is clear that the exchange of activities and abilities which takes place in the sphere of production falls directly within the latter and constitutes one of its essential elements. In the second place, the same is true of the exchange of products, in so far as it is a means of completing a certain product, designed for immediate consumption. To that extent exchange constitutes an act included in production. Thirdly, the so-called exchange between dealers and dealers162 is by virtue of its organization determined by production, and is itself a species of productive activity. Exchange appears to be independent of and indifferent to production only in the last stage when products are exchanged directly for consumption. But in the first place, there is no exchange without a division of labor, whether natural or as a result of historical development; secondly, private exchange implies the existence of private production; thirdly, the intensity of exchange, as well as its extent and character are determined by the degree of development and organization of production, as e. g. exchange between city and country, exchange in the country, in the city, etc. Exchange thus appears in all its aspects to be directly included in or determined by production.
The result we arrive at is not that production, distribution, exchange, and consumption are identical, but that they are all members of one