Incredible summation of Marx's theory, and to be quite frank a good primer for Marx's Capital. I can definitely see this helping beginner's understand Marx more thoroughly.
Some personal notes on value from this book:
Value is a threefold abstract phenomenon with many inner determinations that consists of and is analyzed by Marx in terms of form (appearance), substance (content), and magnitude (labor-time). Value is a purely social phenomenon that “does not include a single atom of matter.”
The value-form is the abstract social form that the product of labor assumes in a commodity economy – exchange-value is the concrete and specific form of value – which is merely the expression of value, the form it takes, and is not value itself – which seems like a common misconception
Value is expressed, manifests itself, and is formed in and through exchange, and in relation to other commodities. Therefore, the value-form and the form of exchangeability are the same (this should not be confused or conflated with exchange-value, but rather the necessity for exchange abstractly for value to be realized):
Value exists as a social relation of abstract labor before it is expressed in exchange. Exchange-value is its necessary form of appearance or mode of expression, but value itself is prior. Products of labor have value even if unsold, though this value is not realized. Value is not created by exchange, but is only realized through exchange (labor creates value in production; exchange socially validates it).
And as Rubin elucidates:
“As we can see, the form of value is called a form of exchangeability, or a social form of the product of labor which resides in the fact that it can be exchanged for any other commodity, if this exchangeability is determined by the quantity of labor necessary for the production of the given commodity.”
It must be clarified that the value-form is not merely the capacity for exchange. The value-form is a socially determined exchangeability, whereby it consists in the social necessity for commodities to express their value through exchange, rooted in abstract equality of labor under capitalism. Trade and exchange exist in most if not all forms of society, but under capitalism it is a systemic requirement for value to manifest. This necessity obscures the social relations of production, rendering them as relations between things (commodity fetishism).
As mentioned briefly before, the relationship between the value-form (Wertform) and exchange-value (Tauschwert) must be analyzed closely. The value-form represents the abstract social form of value, which is not tied to material objects but reflects the social necessity of commodities to express their value through relations with other commodities. The value-form is the universal property of all commodities in capitalist society, rooted in the social organization of labor. It homogenizes concrete labors into abstract labor through the act of exchange, a social construct specific to capitalism.
Exchange-value, on the other hand, is the concrete, observable proportions in which commodities trade for. It is the “phenomenal form” through which value manifests but is distinct from value itself. Exchange-value is accidental and relative, it varies with market conditions, while the value-form represents the deeper social logic underlying the ratios of exchange-values, i.e. the relation of commodities to other commodities. Exchange-value is the mode of expression of value, not its essence.
Marx separates the analysis of value from its monetary expression to avoid collapsing social form (value-form) into material content (exchange-value). As Rubin clarifies:
“Marx analyzes the 'form of value' (Wertform) separately from exchange value (Tauschwert). In order to include the social form of the product of labor in the concept of value, we had to split the social form of the product into two forms: Wertform (value-form) and Tauschwert (exchange-value). By the first we mean the social form of the product which is not yet concretized in determined things, but represents some abstract property of commodities. In order to include in the concept of value the properties of the social form of the product of labor and thus show the inadmissibility of identifying the concept of value with the concept of labor, an identification which was often approached by popular presentations of Marx, we have to prove that value must be examined not only from the aspect of the substance of value (i.e., labor), but from the aspect of the 'form of value.' In order to include the form of value in the concept of value itself, we have to separate it from exchange value, which is treated separately from value by Marx. Thus we have broken down the social form of the product into two parts: the social form which has not yet acquired a concrete form (i.e., 'form of value'), and the form which already has a concrete and independent form (i.e., exchange value).”
Value-form is the qualitative aspect of value, whereby it is grasped through abstracting it from exchange, the quantitative, empirical, observable aspect, which is incomplete without understanding the value-form. The substance (abstract labor) and form (value-form) of value are dialectically unified: abstract labor is socially validated through the value-form, which presupposes abstract labor as its substance.
The value-form evolves through stages – simple, expanded, general, and money forms – which reflects the maturation of commodity relations. Money, as the universal equivalent, is the necessary culmination of the value-form, enabling all commodities to express value quantitatively (price). The value-form’s development mirrors the historical emergence of capitalism, where labor becomes universally abstract.
Exchange-value represents a historical constant in trade but gains specificity under capitalism, whereby the variability of exchange-value masks the stability of the value-form as a regulator of production. While exchange has existed in most societies, under capitalism, exchange-value is systematized (via money) and becomes the dominant form of social reproduction. This stability reflects the law of value – socially necessary labor-time regulating prices and exchange in the long run – which governs production despite market price volatility. The law of value is enforced through capitalist competition, which compels producers to align individual labor-times with socially necessary labor-time. Exchange-value fluctuates and oscillates around value, which acts as a sort of anchor, almost like a center of gravity.
So, then, what is the substance of value? Labor:
“Now we know the substance of value. It is labor…”
The substance (content) of value is abstract human labor – labor stripped of its concrete, qualitative characteristics and reduced to homogenous, socially necessary expenditure of human labor-power. Abstract labor being the social category of labor – not a physical or technical category – that is specific to capitalist commodity production; the physical and/or technical category of labor is known as concrete labor:
“Human labor-power in its fluid state, or human labor, creates value, but is not itself value. It becomes value in its coagulated state, in objective form… On the one hand all labour is, speaking physiologically, an expenditure of human labour-power, and in its character of identical abstract human labour, it creates and forms the value of commodities. On the other hand, all labour is the expenditure of human labour-power in a special form and with a definite aim, and in this, its character of concrete useful labour, it produces use-values.”
Insofar as the substance of value is labor, it is only abstract human labor that determines and counts toward value; concrete labor does not. Labor expended inefficiently does not create value. Value is a social relation, not a calculation of concrete specific labor.
Now that form and substance have been covered, magnitude is the third manifold of value to be analyzed closely.
The magnitude of value is determined by the average labor-time required to produce a commodity under existing conditions.
Productivity reduces value as it shrinks the socially necessary labor-time for production of a given commodity (*tie into surplus-value extraction, subsumption, and TRPF* later)
Individual producers may expend more or less labor-time than SNLT, but the market enforces SNLT as a regulator, i.e. the law of value:
“The magnitude of value is determined not by the labor actually expended by an individual producer, but by the labor that society recognizes as necessary.”
The substance of value is a social abstraction enforced by the value-form; labor is homogenized into a universal “social substance” only when products take the form of commodities and equate to one another in and through exchange:
“Labor acquires the property of creating value only when it is organized in a system of commodity exchange.”
The form of value cannot exist unless labor is already abstracted from its concrete specificity. In the act of equating one commodity to another, there is a presupposition that their labor has been socially equalized. Substance of value (labor) is concealed and obscured by the form of value by presenting value as a natural property of commodities rather than a social relation. The form conceals the substance even as it expresses it.
The magnitude of value is not the sum of individual hours, but a social average. Labor only creates value if the prevailing conditions of production in society realizes it as value-creating. Expended labor that goes beyond the SNLT does not contribute to value creation. SNLT operates behind the backs of workers and production, and mostly without their knowledge; it is a mechanism that through society the value of a product of labor is accepted as valuable as far as the labor expended to produce it is determined to be necessary. Thus, SNLT is a relation of production whereby producers and consumers, i.e. society, agrees upon what labor is necessary for production.
SNLT is latent in production but is only realized through exchange; a commodity’s value exists as SNLT, but its magnitude becomes visible only in exchange. It is through the magnitude of value that the concrete form of value takes an appearance, i.e. exchange-value.
Substance, magnitude, and form are linked to each other as a unified process that expresses the inner determinations of value; as such they each play mutually determining roles on one another. The dialectic of value’s determinations reveals capitalism as a system where social relations dominate individuals, appearing as an objective ‘second nature’ governed by value’s laws.