Lysenkoism was a pseudoscientific political campaign led by the Soviet biologist Trofim Lysenko against genetics and science-based agriculture in the mid-20th century, rejecting natural selection in favour of a form of Lamarckism, as well as expanding upon the techniques of vernalization and grafting.
More than 3,000 mainstream biologists were dismissed or imprisoned, and numerous scientists were executed in the Soviet campaign to suppress scientific opponents. The president of the Soviet Agriculture Academy, Nikolai Vavilov, who had been Lysenko's mentor, but later denounced him, was sent to prison and died there, while Soviet genetics research was effectively destroyed. Research and teaching in the fields of neurophysiology, cell biology, and many other biological disciplines were harmed or banned.
The government of the Soviet Union (USSR) supported the campaign, and Joseph Stalin personally edited a speech by Lysenko in a way that reflected his support for what would come to be known as Lysenkoism, despite his skepticism toward Lysenko's assertion that all science is class-orientated in nature. Lysenko served as the director of the USSR's Lenin All-Union Academy of Agricultural Sciences. Other countries of the Eastern Bloc including the People's Republic of Poland, the Republic of Czechoslovakia, and the German Democratic Republic accepted Lysenkoism as the official "new biology", to varying degrees, as did the People's Republic of China for some years.
Context
Mendelian genetics, the science of heredity, developed into an experimentally based field of biology at the start of the 20th century through the work of August Weismann, Thomas Hunt Morgan, and others, building on the rediscovered work of Gregor Mendel. They showed that the characteristics of an organism are carried by inherited genes, which were located on chromosomes in each cell's nucleus. Genes can be affected by random changes (mutations), and can be shuffled and recombined during sexual reproduction, but are otherwise passed on unchanged from parent to offspring. Beneficial changes can propagate through a population by natural selection or, in agriculture, by plant breeding.
Some Marxists, however, perceived a fissure between Marxism and Darwinism. Specifically, the issue is that while the "struggle for survival" in Marxism applies to a social class as a whole (the class struggle), the struggle for survival in Darwinism is decided by individual random mutations. This was deemed a liberal doctrine, against the Marxist framework of "immutable laws of history" and the spirit of collectivism. In contrast, Lamarckism proposed that an organism can somehow pass on characteristics that it has acquired during its lifetime to its offspring, implying that changing the body can affect the genetic material in the germ line. To these Marxists, a "neo-Lamarckism" was deemed more compatible with Marxism.
The Marxist principle of partiinost (party spirit) held that science is tied to class interests: scientists had a duty to serve the working class. This caused scientific findings to be judged by their economic and political utility, and allowed for questionable work. Marxist revolutionary Nikolai Bukharin downplayed realist interpretations of nature. He said that science had to show how to manipulate natural phenomena to serve the interests of the proletarian class. Because genetics was linked to eugenics and social Darwinism, it was rejected as bourgeois, regardless of the evidence for it.
Marxism–Leninism, which became the official ideology in Stalin's USSR, incorporated Darwinian evolution as a foundational doctrine, providing a scientific basis for its state atheism. Initially, the Lamarckian principle of inheritance of acquired traits was considered a legitimate part of evolutionary theory, and Darwin himself supported it. Although the Mendelian view had largely replaced Lamarckism in western biology by 1925, it persisted in Soviet doctrine. Besides the fervent "old style" Darwinism of Marx and Engels which included elements of Lamarckism, two fallacious experimental results supported it in the USSR. First, Ivan Pavlov, who discovered conditioned reflex, announced in 1923 that it can be inherited in mice; and his subsequent withdrawal of this claim was ignored by Soviet ideologists. Second, Ivan Michurin interpreted his work on plant breeding as proof of the inheritance of acquired traits. Michurin advocated directed plant breeding by environmental control: "We cannot wait for favors from nature: we must wrest them from her".
Kliment Timiryazev, a popularizer of science in Russia, had sympathies with communism, and allied with the new Soviet republic. This made his views more orthodox and widely known. When gene theory rose in early 1900s, some gene theorists promoted saltative forms of mutationism as an alternative to gradualist Darwinism, and Timiryazev vigorously argued against it. Timiryazev's views influenced many, including Michurin.
Soviet agriculture around 1930 was in a crisis due to Stalin's forced collectivisation of farms and extermination of kulak farmers. The resulting Soviet famine of 1932–1933 provoked the government to search for a technical solution which would maintain their central political control.
In the Soviet Union
Lysenko's biological claims
In 1928, rejecting natural selection and Mendelian genetics, Trofim Lysenko claimed to have developed agricultural techniques which could radically increase crop yields. These included vernalization, species transformation (one species turning into another), inheritance of acquired characteristics, and vegetative hybridisation (see below). He claimed in particular that vernalization, exposing wheat seeds to humidity and low temperature, could greatly increase crop yield. He claimed further that he could transform one species, Triticum durum (durum spring wheat), into Triticum vulgare (common autumn wheat), through 2 to 4 years of autumn planting. This species transition he claimed to occur without an intermediate form. However, this was already known to be impossible since T. durum is a tetraploid with 28 chromosomes (4 sets of 7), while T. vulgare is hexaploid with 42 chromosomes (6 sets). This objection did not faze Lysenko, as he claimed that the chromosome number changed as well.
Lysenko claimed that the concept of a gene was a "bourgeois invention", and he denied the presence of any "immortal substance of heredity" or "clearly defined species", which he claimed belong to Platonic metaphysics rather than strictly materialist Marxist science. Instead, he proposed a "Marxist genetics" postulating an unlimited possibility of transformation of living organisms through environmental changes in the spirit of Marxian dialectical transformation, and in parallel to the Party's program of creating the New Soviet Man and subduing nature for his benefit. Lysenko refused to admit random mutations, stating that "science is the enemy of randomness".
Lysenko further claimed that Lamarckian inheritance of acquired characteristics occurred in plants, as in the "eyes" of potato tubers, though the genetic differences in these plant parts were already known to be non-heritable somatic mutations. He claimed that when a tree is grafted, the scion permanently changes the heritable characteristics of the stock. In modern biological theory, such a change is imaginable through horizontal gene transfer; however, there is no evidence that this actually occurs, and Lysenko rejected the mechanism of genes entirely.
Lysenko denied that intraspecific competition occurred in nature because the reality of competition between individuals validated that overpopulation and limited resources were real phenomena. He claimed that the only biological competition that occurs is competition between species, not within one.
Rise
Isaak Izrailevich Prezent, a biologist politically out of favour, brought Lysenko to public attention. He portrayed Lysenko as a genius who had developed a revolutionary technique which could lead to the triumph of Soviet agriculture, a thrilling possibility for a Soviet society suffering through Stalin's famines. Lysenko became a favorite of the Soviet propaganda machine, which overstated his successes, trumpeted his faked experimental results, and omitted any mention of his failures. State media published enthusiastic articles such as "Siberia is transformed into a land of orchards and gardens" and "Soviet people change nature", while anyone opposing Lysenko was presented as a defender of "mysticism, obscurantism and backwardness."
Lysenko's political success was mostly due to his appeal to the Communist Party and Soviet ideology. His attack on the "bourgeois pseudoscience" of modern genetics and the proposal that plants can rapidly adjust to a changed environment suited the ideological battle in both agriculture and Soviet society. Following the disastrous collectivization efforts of the late 1920s, Lysenko's new methods were seen by Soviet officials as paving the way to an "agricultural revolution." Lysenko himself was from a peasant family and was an enthusiastic advocate of Leninism. The Party-controlled newspapers applauded Lysenko's practical "success" and questioned the motives of his critics, ridiculing the timidity of academics who urged the patient, impartial observation required for science. Lysenko was admitted into the hierarchy of the Communist Party, and was put in charge of agricultural affairs.
He used his position to denounce biologists as "fly-lovers and people haters", and to decry traditional biologists as "wreckers" working to sabotage the Soviet economy. He denied the distinction between theoretical and applied biology, and rejected general methods such as control groups and statistics:
We biologists do not take the slightest interest in mathematical calculations, which confirm the useless statistical formulae of the Mendelists … We do not want to submit to blind chance … We maintain that biological regularities do not resemble mathematical laws.
Lysenko presented himself as a follower of Ivan Vladimirovich Michurin, a well-known and well-liked Soviet horticulturist, but unlike Michurin, Lysenko insisted on using only non-genetic techniques such as hybridization and grafting.
Support from Joseph Stalin increased Lysenko's popularity. In 1935, Lysenko compared his opponents in biology to the peasants who still resisted the Soviet government's collectivization strategy, saying that the opponents of his theories were opponents of Marxism. Stalin was in the audience for this speech, and was the first to stand and applaud, calling out "Bravo, Comrade Lysenko. Bravo." Stalin personally made encouraging edits to a speech by Lysenko, despite the dictator's skepticism toward Lysenko's assertion that all science is class-orientated. The official support emboldened Lysenko and gave him and Prezent free rein to slander any geneticists who still spoke out against him. After Lysenko became head of the Soviet Academy of Agricultural Sciences, classical genetics began to be called "fascist science" and many of Lysenkoism's opponents, such as his former mentor Nikolai Ivanovich Vavilov, were imprisoned or executed, although not on Lysenko's personal orders.
During 1947 October, Lysenko and Stalin exchanged multiple letters. Lysenko promised Stalin to breed branching wheat into a yield of 15,000 kg/ha. At that time, the most productive wheat breed under exceptionally favorable conditions could achieve 2,000 kg/ha. Lysenko's letter to Stalin, dated October 27, 1947 read;
Mendelism-Morganism, Weissmanist neo-Darwinism ... are not developed in Western capitalist countries for the purposes of agriculture, but rather serve reactionary purposes of eugenics, racism, etc. There is no relationship between agricultural practices and the theory of bourgeois genetics.
Peak
From July 31 to August 7, 1948, the Academy of Agricultural Sciences (VASKhNIL) held a week-long session (August 1948 Session of VASKhNIL), organized by Lysenko and approved by Stalin. At the end of it, Lysenkoism was declared as "the only correct theory." As Lysenko performatively spoke at the end, "the Central Committee of the Communist Party has examined my report and approved it". Attendants recognized this as the birth of a new orthodoxy. Of the 8 scientists who advocated genetics during the session, 3 immediately announced repentance.
Soviet scientists were required to denounce any work that contradicted Lysenko, and criticism was denounced as "bourgeois" or "fascist". The Ministry of Higher Education commanded all biological institutes to immediately follow the Lysenko orthodoxy:
The Central University Administration and the Administration of Cadres are directed to review within two months all departments of biological faculties to free them from all opposed to Michurinist biology and to strengthen them by appointing Michurinists to them.
Point 6 of the Order No. 1208 (August 23, 1948)
For several months, similar central directives dismissed scientists, withdrew textbooks, and required the removal of any references to heredity in higher education. There was an order to destroy all stocks of Drosophila, a common model organism for research in genetics. Leading geneticists were being monitored by secret agents from the State Security Service.