“No human race is superior; no religious faith is inferior. All collective judgments are wrong. Only racists make them.”

Statement quoted in the Boston Globe (25 October 1977)

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88 Precepts

Report to the Seventeenth Party Congress on the Work of the Central Committee of the C.P.S.U. (B.) https://www.marxists.org/reference/archive/stalin/works/1934/01/26.htm (January 26, 1934)
Stalin's speeches, writings and authorised interviews
Context: Still others think that war should be organised by a "superior race," say, the German "race," against an "inferior race," primarily against the Slavs; that only such a war can provide a way out of the situation, for it is the mission of the "superior race" to render the "inferior race" fruitful and to rule over it. Let us assume that this queer theory, which is as far removed from science as the sky from the earth, let us assume that this queer theory is put into practice. What may be the result of that? It is well known that ancient Rome looked upon the ancestors of the present-day Germans and French in the same way as the representatives of the "superior race" now look upon the Slav races. It is well known that ancient Rome treated them as an "inferior race," as "barbarians," destined to live in eternal subordination to the "superior race," to "great Rome", and, between ourselves be it said, ancient Rome had some grounds for this, which cannot be said of the representatives of the "superior race" of today. (Thunderous applause.) But what was the upshot of this? The upshot was that the non-Romans, i. e., all the "barbarians," united against the common enemy and brought Rome down with a crash. The question arises: What guarantee is there that the claims of the representatives of the "superior race" of today will not lead to the same lamentable results? What guarantee is there that the fascist literary politicians in Berlin will be more fortunate than the old and experienced conquerors in Rome? Would it not be more correct to assume that the opposite will be the case?

Source: Bellwether (1996), Chapter 3 “Tributaries”, Section 3 (p. 117)

Source: Faith vs. Fact (2015), p. 25

Source: Moral Man and Immoral Society (1932), pp. 8-9
Context: The inevitable hypocrisy, which is associated with the all the collective activities of the human race, springs chiefly from this source: that individuals have a moral code which makes the actions of collective man an outrage to their conscience. They therefore invent romantic and moral interpretations of the real facts, preferring to obscure rather than reveal the true character of their collective behavior. Sometimes they are as anxious to offer moral justifications for the brutalities from which they suffer as for those which they commit. The fact that the hypocrisy of man's group behavior... expresses itself not only in terms of self-justification but in terms of moral justification of human behavior in general, symbolizes one of the tragedies of the human spirit: its inability to conform its collective life to its individual ideals. As individuals, men believe they ought to love and serve each other and establish justice between each other. As racial, economic and national groups they take for themselves, whatever their power can command.

Statement quoted in the Boston Globe (25 October 1977)
Context: Even today, we are still accused of racism. This is a mistake. We know that all interracial groups in South Africa are relationships in which whites are superior, blacks inferior. So as a prelude whites must be made to realize that they are only human, not superior. Same with blacks. They must be made to realize that they are also human, not inferior.

Introduction
A Treatise of Human Nature (1739-40)

Source: October 1881. See The Nineteenth Century — A monthly review, Volume 10 https://books.google.com.br/books?id=QYEPAAAAMAAJ&pg=PA813, edited by James Knowles, London, 1881.