Value-form
The Western Left academics are nowadays very happy to talk about "varieties of capitalism", but talking about "varieties of socialism" remains almost an absolute "no-no". Most Marxists continue to believe in "only one" (Marxian) socialism: either that, or nothing at all. "Either" a society or movement conforms to the true concept of socialism, "or" it does not; and if it does not, it "cannot be" socialism. However, precisely "because" there are many different Marxist beliefs about socialism, Marxists cannot agree among themselves whether Soviet-type societies were socialist, capitalist, or something else. Some countries meet with the moral expectations which Marxists have, and others do not.Originally Marx and Engels themselves had heckled the advocates of "true socialism", but later Friedrich Engels and Karl Kautsky promoted Marxist socialism as the one and true "scientific socialism" within the Socialist International. When he was 43 years old, Lenin stated: "The Marxist doctrine is omnipotent because it is true". Lenin's Communist International (a deliberate split with the social democrats) adopted Marxist socialism as its official political doctrine.
C. Wright Mills
"The Marxists" (1962) takes Mills's explanation of sociological models from "Images of Man" and uses it to criticize modern liberalism and Marxism. He believes that the liberalist model does not work and cannot create an overarching view of society, but rather it is more of an ideology for the entrepreneurial middle class. Marxism, however, may be incorrect in its overall view, but it has a working model for societal structure, the mechanics of the history of society, and the roles of individuals. One of Mills's problems with the Marxist model is that it uses units that are small and autonomous, which he finds too simple to explain capitalism. Mills then provides discussion on Marx as a determinist.