Answer:
Lev Vygotsky.
Explanation:
Lev Vygotsky was the famous psychologists who gave the socio cultural theory. He also gave the theory of consciousness and did a lot of research in the development psychology.
His theory believes that older individuals play an important role in the learning of the younger individuals and younger get assisted more in their learning and influenced by their older ones. He have the theory of Marxist theory of human cultural and bio-social development
Thus, the answer is lev Vygotsky.