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Lev Vygotsky, Belarusian-Russian psychologist and theorist (born 1896)

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Lev Vygotsky
Soviet psychologist (1896–1934)
Lev Semyonovich Vygotsky 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…Source: Wikipedia (CC BY-SA)