Who invented self concept?

Self-concept begins at birth and is first recognized and developed with nuturing parents, friends, extended family, etc. Self-concept continues everyday, as long as one lives and is reinforced by people, events, one's faith, and what one contributes to society.

Self-concept is formed by actions and reactions to the world around him or her and eventually leads to a positive or negative life--depending on how the individual responds to life situations...