Final answer:
Vygotsky's sociocultural theory of development emphasizes the influence of culture on human development, particularly in the formation of language and thought. He also considered historical influences as important factors in development.
Step-by-step explanation:
Lev Vygotsky was a Russian psychologist who proposed a sociocultural theory of development. He suggested that human development is rooted in one's culture. A child's social world forms the basis for the formation of language and thought. The language one speaks and the ways a person thinks about things is dependent on one's cultural background. Vygotsky also considered historical influences as key to one's development. He was interested in the process of development and the individual's interactions with their environment (John-Steiner & Mahn, 1996).