Lev Vygotsky

Lev Semyonovich Vygotsky (Russian: Лев Семёнович Выготский; born 17 November 1896 [O.S. 5 November] - died 11 June 1934) was a Soviet psychologist, the founder of an unfinished theory of human cultural and bio-social development commonly referred to as cultural-historical psychology, a prominent advocate for a new theory of consciousness, the "psychology of superman", and leader of the Vygotsky Circle (also referred to as "Vygotsky-Luria Circle").