My spin doctor told me to lose some historical materialism

[professor rat]

" . . . Some people believe that Marxism and anarchism are based on the same principles and that the disagreements between them concern only tactics, so that, in the opinion of these people, it is quite impossible to draw a contrast between these two trends.
This is a great mistake.
We believe that the Anarchists are real enemies of Marxism. Accordingly, we also hold that a real struggle must be waged against real enemies. Therefore, it is necessary to examine the “doctrine” of the Anarchists from beginning to end and weigh it up thoroughly from all aspects.

AND

" . . . Proudhon, the “father” of the Anarchists, said that there existed in the world an immutable justice determined once and for all, which must be made the basis of future society. That is why Proudhon has been called a metaphysician. Marx fought Proudhon with the aid of the dialectical method and proved that since everything in the world changes, “justice” must also change, and that, consequently, “immutable justice” is metaphysical nonsense (see K. Marx, The Poverty of Philosophy).

https://www.marxists.org/reference/archive/stalin/works/1906/12/x01.htm

AND

" . . . To proceed. Our “celebrated” Anarchists heard somewhere that Marx’s materialism was a “belly theory,” and so they rebuke us, Marxists, saying :

“In the opinion of Feuerbach, man is what he eats. This formula had a magic effect on Marx and Engels,” and, as a consequence, Marx drew the conclusion that “the main and primary thing is economic conditions, relations of production. . . .” And then the Anarchists proceed to instruct us in a philosophical tone: “It would be a mistake to say that the sole means of achieving this object of social life) is eating and economic production. . . . If ideology were determined mainly, monistically, by eating and economic conditions—then some gluttons would be geniuses” (see Nobati, No. 6. Sh. G.).

You see how easy it is to refute the materialism of Marx and Engels! It is sufficient to hear some gossip in the street from some schoolgirl about Marx and

Engels, it is sufficient to repeat that street gossip with philosophical aplomb in the columns of a paper like Nobati, to leap into fame as a “critic” of Marxism!

But tell me, gentlemen: Where, when, on which planet, and which Marx did you hear say that “eating determines ideology”? Why did you not cite a single sentence, a single word from the works of Marx to back your assertion? True, Marx said that the economic conditions of men determine their consciousness, their ideology, but who told you that eating and economic conditions are the same thing? Don’t you really know that physiological phenomena, such as eating, for example, differ fundamentally from sociological phenomena, such as the economic conditions of men, for example? One can forgive a schoolgirl, say, for confusing these two different phenomena; but how is it that you, the “vanquishers of Social-Democracy,” “regenerators of science,” so carelessly repeat the mistake of a schoolgirl?

AHEM . . . 

KARL " no wonder that, in the South, the stomach serves as the organ of accumulated property, and that a Kaffir estimates the wealth of a man by the size of his belly. That the Kaffirs know what they are about is shown by the following: at the same time that the official British Health Report of 1864 disclosed the deficiency of fat-forming food among a large part of the working-class, a certain Dr. Harvey (not, however, the celebrated discoverer of the circulation of the blood), made a good thing by advertising recipes for reducing the superfluous fat of the bourgeoisie and aristocracy. . . . ." MARX

https://www.marxists.org/archive/marx/works/1867-c1/ch03.htm