---
title: "Repression of science in the Soviet Union"
chunk: 1/2
source: "https://en.wikipedia.org/wiki/Repression_of_science_in_the_Soviet_Union"
category: "reference"
tags: "science, encyclopedia"
date_saved: "2026-05-05T04:30:26.645200+00:00"
instance: "kb-cron"
---

Many fields of scientific research in the Soviet Union were banned or suppressed with various justifications. All humanities and social sciences were tested for strict accordance with dialectical materialism. These tests served as a cover for political suppression of scientists who engaged in research labeled as "idealistic" or "bourgeois". Many scientists were fired, others were arrested and sent to Gulags. The suppression of scientific research began during the Stalin era and continued after his death.
The ideologically motivated persecution damaged many fields of Soviet science.

== Examples ==

=== Biology ===

In the mid-1930s, the agronomist Trofim Lysenko started a campaign against genetics and was supported by Stalin. If the field of genetics' connection to Nazis wasn't enough, Mendelian genetics was also suppressed due to beliefs that it was "bourgeoisie science" and its association with the priest Gregor Mendel due to hostility to religion because of the Soviet policy of state atheism.
In 1950, the Soviet government organized the Joint Scientific Session of the USSR Academy of Sciences and the USSR Academy of Medical Sciences, the "Pavlovian session". Several prominent Soviet physiologists (L.A. Orbeli, P.K. Anokhin, Aleksey Speransky, Ivane Beritashvili) were accused of deviating from Pavlov's teaching. As a consequence of the Pavlovian session, Soviet physiologists were forced to accept a dogmatic ideology; the quality of physiological research deteriorated and Soviet physiology excluded itself from the international scientific community. Later Soviet biologists heavily criticised Lysenko's theories and pseudo-scientific methods.

=== Cybernetics ===

Cybernetics was also outlawed as bourgeois pseudoscience during Stalin's reign. Norbert Wiener's 1948 book Cybernetics was condemned and translated only in 1958. A 1954 edition of the Brief Philosophical Dictionary condemned cybernetics for "mechanistically equating processes in live nature, society and in technical systems, and thus standing against materialistic dialectics and modern scientific physiology developed by Ivan Pavlov". (However this article was removed from the 1955 reprint of the dictionary.) After an initial period of doubts, Soviet cybernetics took root, but this early attitude hampered the development of computing in the Soviet Union.

=== History ===

Soviet historiography (the way in which history was and is written by scholars of the Soviet Union) was significantly influenced by the strict control by the authorities aimed at propaganda of communist ideology and Soviet power.
Since the late 1930s, Soviet historiography treated the party line and reality as one and the same. As such, if it was a science, it was a science in service of a specific political and ideological agenda, commonly employing historical negationist methods. In the 1930s, historic archives were closed and original research was severely restricted. Historians were required to pepper their works with references – appropriate or not – to Stalin and other "Marxist-Leninist classics", and to pass judgment – as prescribed by the Party – on pre-revolution historic Russian figures.
Many works of Western historians were forbidden or censored, many areas of history were also forbidden for research as, officially, they never happened. Translations of foreign historiography were often produced in a truncated form, accompanied with extensive censorship and corrective footnotes. For example, in the Russian 1976 translation of Basil Liddell Hart's History of the Second World War pre-war purges of Red Army officers, the secret protocol to the Molotov–Ribbentrop Pact, many details of the Winter War, the occupation of the Baltic states, the Soviet occupation of Bessarabia and Northern Bukovina, Western Allied assistance to the Soviet Union during the war, many other Western Allies' efforts, the Soviet leadership's mistakes and failures, criticism of the Soviet Union and other content were censored out.
Of note was the ban of the theory about the Varangian origin of Kievan Rus for ideological reasons.

=== Linguistics ===
At the beginning of Stalin's rule, the dominant figure in Soviet linguistics was Nikolai Yakovlevich Marr, who argued that language is a class construction and that language structure is determined by the economic structure of society. Stalin, who had previously written about language policy as People's Commissar for Nationalities, read a letter by Arnold Chikobava criticizing the theory. He "summoned Chikobava to a dinner that lasted from 9 p.m. to 7 a.m. taking notes diligently." In this way he grasped enough of the underlying issues to oppose this simplistic Marxist formalism, ending Marr's ideological dominance over Soviet linguistics. Stalin's principal work in the field was a small essay, "Marxism and Linguistic Questions."
The term "semiotics" was banned, and the researchers used the obfuscated term "secondary modeling systems" (Russian: Вторичные моделирующие системы) coined by Juri Lotman and Vladimir Uspensky in 1964; see Tartu–Moscow Semiotic School.

=== Pedology ===
Pedology was a popular area of research on the basis of numerous orphanages created after the Russian Civil War. Soviet pedology was a combination of pedagogy and psychology of human development, that heavily relied on various tests. It was officially banned in 1936 after a special decree of the Central Committee of the Communist Party of the Soviet Union "On Pedolodical Perversions in the Narkompros System" on July 4, 1936.