Lev Semyonovich Vygotsky (, ; ; – June 11, 1934) was a Russian and Soviet psychologist, best known for his work on psychological development in children and creating the framework known as cultural-historical activity theory. After his early death, his books and research were banned in the Soviet Union until Joseph Stalin's death in 1953, with a first collection of major texts published in 1956. A Review of General Psychology survey, published in 2002, ranked Vygotsky as the 83rd most cited psychologist of the 20th century.

His major ideas include: The social origin of mind: Vygotsky believed that human mental and cognitive abilities are not biologically determined, but instead created and shaped by use of language and tools in the process of interacting and constructing the cultural and social environment. The importance of mediation: He saw mediation as the key to human development, because it leads to the use of cultural tools and becomes a pathway for psychological development through the process of interiorization. The zone of proximal development: Vygotsky introduced the concept, which refers to the gap between a child's current level of development and the level they are capable of reaching with tools provided by others with more knowledge. The significance of play: Vygotsky viewed play as a crucial aspect of children's development, as he thought of it as the best sandbox to build and develop the practice of mediation.

Early life and education Lev Simkhovich Vygodsky (his patronymic was later changed to Semyonovich and his surname to Vygotsky for unclear reasons) was born on November 17, 1896, in the town of Orsha in Mogilev Governorate of the Russian Empire (now Belarus) into a non-religious middle-class Jewish family of Simkha Leibovich (also known as Semyon Lvovich), a banker, and Tsetsilia Moiseevna.

Vygotsky was raised in the city of Gomel, where he was home-schooled until 1911 and then obtained a formal degree with distinction in a private Jewish gymnasium, which allowed him entrance to a university. In 1913, Vygotsky was admitted to the Moscow University by mere ballot through a "Jewish Lottery"; at the time, a three percent Jewish student quota was administered for entry in Moscow and Saint Petersburg Universities. He had an interest in the humanities and social sciences, but at the insistence of his parents he applied to the medical school at Moscow University. During the first semester of study, he transferred to the law school. In parallel, he attended lectures at Shanyavsky Moscow City People's University.

Career In January 1924, Vygotsky took part in the Second All-Russian Psychoneurological Congress in Petrograd (soon thereafter renamed Leningrad). After the Congress, Vygotsky met with Alexander Luria and with his help received an invitation to become a research fellow at the Psychological Institute in Moscow which was under the direction of Konstantin Kornilov. Vygotsky moved to Moscow with his new wife, Roza Smekhova, with whom he would have two children. He began his career at the Psychological Institute as a "staff scientist, second class".Van der Veer, R., & Valsiner, J. (1991). Understanding Vygotsky. A quest for synthesis. Oxford: Basil Blackwell. He also became a secondary school teacher, covering a period marked by his interest in the processes of learning and the role of language in learning.

By the end of 1925, Vygotsky completed his dissertation, "The Psychology of Art," which was not published until the 1960s, and a book, "Pedagogical Psychology," which apparently drew on lecture notes he prepared in Gomel while he was a psychology instructor at local educational establishments. In the summer of 1925, he made his first and only trip abroad to a London congress on the education of the deaf.van der Veer, R. & Zavershneva, E. (2011). To Moscow with Love: Partial Reconstruction of Vygotsky's Trip to London. Integrative Psychological and Behavioral Science 45(4), 458–474: PDF, pdf Upon return to the Soviet Union, he was hospitalized due to tuberculosis and would remain an invalid and out of work until the end of 1926.Завершнева Е.Ю. «Ключ к психологии человека»: комментарии к блокноту Л.С. Выготского из больницы «Захарьино» (1926 г.) // Вопр. психол. 2009. No.3. С. 123—141.Zavershneva, E. "The Key to Human Psychology". Commentary on L.S. Vygotsky's Notebook from the Zakharino Hospital (1926). Journal of Russian and East European Psychology 50(4), July–August 2012.

After his release from the hospital, Vygotsky did theoretical and methodological work on the crisis in psychology, but never finished the draft of the manuscript and interrupted his work on it around mid-1927. The manuscript was published later with notable editorial interventions and distortions in 1982 and was presented by the editors as one of the most important of Vygotsky's works.Zavershneva, E. 2009. Issledovanie rukopisi L.S. Vygotskogo "Istoricheskii smysl psikhologicheskogo krizisa" [Investigation of the original of Vygotsky's manuscript "Historical meaning of crisis in psychology"]. Voprosy psikhologii (6):119-137.Завершнева Е.Ю. Исследование рукописи Л.С. Выготского "Исторический смысл психологического кризиса" // Вопросы психологии, 2009. No.6, с. 119 - 138.Zavershneva, E. Investigating the Manuscript of L.S. Vygotsky's "The Historical Meaning of the Crisis in Psychology". Journal of Russian and East European Psychology, 50(4), July–August 2012.Завершнева Е.Ю., Осипов М.Е. Основные поправки к тексту «Исторический смысл психологического кризиса», опубликованному в 1982 г. в собрании сочинений Л.С. Выготского // Вопросы психологии, 2010. No.1. С. 92—103.E. Iu. Zavershneva and M. E. Osipov. Primary Changes to the Version of "The Historical Meaning of the Crisis in Psychology" Published in the Collected Works of L. S. Vygotsky. Journal of Russian and East European Psychology, vol. 50(4), July–August 2012. In this early manuscript, Vygotsky argued for the formation of a general psychology that could unite the naturalist objectivist strands of psychological science with the more philosophical approaches of Marxist orientation. However, he also harshly criticized those of his colleagues who attempted to build a "Marxist Psychology" as an alternative to the naturalist and philosophical schools. He argued that if one wanted to build a truly Marxist psychology, there were no shortcuts to be found by merely looking for applicable quotes in the writings of Marx. Rather, one should look for a methodology that was in accordance with the Marxian spirit.Kozulin, Alex. 1986. "Vygotsky in Context" in Vygotsky L. "Thought and Language", MIT Press. pp. xi - lvii

From 1926 to 1930, Vygotsky worked on a research program investigating the development of higher psychological functions, i.e. culturally-governed lower psychological functions such as voluntary attention, selective memory, object-oriented action, and decision making. During this period, he gathered a group of collaborators including Alexander Luria, Boris Varshava, Alexei Leontiev, Leonid Zankov, and several others. Vygotsky guided his students in researching this phenomenon from three different perspectives: The instrumental approach, which aimed to understand the ways humans use objects as mediation aids in memory and reasoning. A developmental approach, focused on how children acquire higher cognitive functions during development A culture-historical approach, studying how social and cultural patterns of interaction shape forms of mediation and developmental trajectories

Death Vygotsky died of a relapse of tuberculosis on June 11, 1934, at the age of 37, in Moscow. One of Vygotsky's last private notebook entries was:

The urn containing Vygotsky's ashes was buried, in section 3 of Moscow's Novodevichy Cemetery.

Chronology of the most important events of life and career

1922–24 – worked in the psychological laboratory which he organized in Gomel Pedagogical College;

January 1924 – meeting Luria at the II Psychoneurological Congress in Petrograd, moving from Gomel to Moscow, enrolling in graduate school and taking a position at the State Institute of Experimental Psychology in Moscow;

July 1924 – the beginning of work as the head of the sub-department of the education of physically and intellectually disabled children in the department of social and legal protection of minors (SPON);

November 1924 – during II Congress of the Social and Legal Protection of Minors in Moscow, a turn of Soviet defectology to social education was officially announced and collection of articles and materials edited by Vygotsky "Issues of the upbringing of blind, deaf and mentally retarded children" was published;

May 9, 1925 – the birth of the first child: the daughter Gita

Summer of 1925 – the only trip abroad: went to London for a defectology conference; on the way passed through Germany, where he met with German psychologists

November 5, 1925 – Vygotsky, in absence (due to illness), was awarded the title of senior researcher, equivalent to the modern degree of candidate of sciences for defense of the dissertation "Psychology of Art." The contract for the publication of The Psychology of Art was signed on November 9, 1925, but the text was published only in 1965;

November 21, 1925 to May 22, 1926 – hospitalization in the Zakharyino sanatorium-type hospital due to tuberculosis; upon discharge qualified as a disabled person until the end of the year;

1926 – Vygotsky's first book, Pedagogical Psychology, was published; writes notes and essays that would be published years later under the title "The Historical Meaning of the Psychological Crisis";

1927 – resumes work at the RANION Institute of Experimental Psychology and in a number of other institutions in Moscow and Leningrad;

September 17, 1927 – approved as a professor by the scientific and pedagogical section of the State Academic Council (SUS);

December 19, 1927 – appointed as the head of the Medical and Pedagogical Station of the Glavsotsvos of the People's Commissariat of Education of the RSFSR, remained in this position until October 1928 (dismissed on his own will);

December 28, 1927 to January 4, 1928 – First All-Russian Pedological Congress, Moscow: Vygotsky works as co-editor of the section on difficult childhood, and also presents two reports: "The development of a difficult child and its study" and "Instrumental method in pedology"; these two articles together with Zankov's report "Principles for the construction of complex programs of an auxiliary school from a pedological point of view" and Luria "On the methodology of instrumental-psychological research" become the first public presentation of "Instrumental Psychology" as a research method associated with the names of Vygotsky and Luria;

1928 – Vygotsky's second book "Pedology of School Age" was published, along with a number of articles establishing "Instrumental Psychology" approach in Russian and English language journals;

December 1928 – after a conflict with the director of the Institute of Experimental Psychology (GIEP) K. N. Kornilov, the research activities of the Vygotsky-Luria group were curtailed in this organization, and experimental research was transferred to the Academy of Communications.

1929 – freelance scientific consultant, head of psychological laboratories at the Experimental Defectological Institute (transformed Medical-pedagogical station)

Major themes of research