“Where I am now” in terms of trying to explain Rosdolsky’s interpretation of Marx on “the transition [from value and money] to capital” (chapter 11 in “Making Capital”) — if that is at all possible and the attempt further suggesting that I’m wrong or at least too simplistic — is that, in order to develop capital from money, “selling in order to buy” (C-M-C), must pass over to “buying in order to sell” (M-C-M). “Only under these conditions i.e. if the circuit C-M-C turns into the circuit M-C-M, can money become self-preserving and self-augmenting value, become capital” (p. 188).
In the simple commodity circuit “C-M-C”, a commodity owner begins by exchanging a commodity for its equal in money. Next, our commodity owner exchanges this money for an equivalent value in new commodities. Thinking qualitatively, i.e. in terms of use value, the owner exchanges a commodity which is not a use value for him for another commodity which is useful for him, via the universal equivalent — money. Considered quantitatively, there is no increase or expansion of value and the exchanges values of each commodity are equal.. which is also equivalent to the value of the money involved. We notice commodities are exchanged for their equivalent in money form. And money is exchanged for its equivalent commodity form of value. This means that simple commodity exchange is a process of exchanging equivalent exchange values with a view on consumption, not increasing exchange value.
“One commodity is ultimately exchanged for another commodity… and the circulation itself only served, on the one hand to allow use values to change hands according to need, and on the other to allow them to change hands to the extent to which labor time is contained in them… and to the extent to which they are factors of equal weight in general social labor time”. (p. 185). But “Value does not emerge from value; rather, value is thrown into circulation in the form of a commodity… The same magnitude of value which previously existed in the form of the commodity, now exists in the form of money” (pp. 186-187).
Already, we see how simple commodity exchange — selling in order to buy — is determined by the use value of a commodity. At this stage of economic development, exchange value has not yet thrown use value into the dustbin. However, dominance of exchange value.. “where exchange value as such becomes further developed” (p. 186).. “the form wherein exchange value is the point of departure” (p. 184)… is the basis of the capitalist mode of production. “Capital must be understood as self-augmenting value… And for this purpose it is necessary to proceed… from ‘exchange value’” (p. 185). But capital is not simply “self-reproducing exchange value” (p. 184). That is, cannot be accumulated unless commodities are exchanged for an increase in money.
In the capital exchange circuit, “M-C-M”, value only becomes capital and the owner of money a capitalist because the commodities are produced with a view towards exchanging them for a greater exchange value than the original exchange value of “M”. In this circuit, in its complete form, the function of labor power is not only useful but becomes essential. And thus we arrive at the core of capitalist society — commodity exchange of labor power for wages.