This document summarizes Erikson's psychosocial theory of development. It outlines the 8 stages of development from infancy to late adulthood defined by Erikson, including the key social relationships and expected behaviors at each stage. The stages include trust vs mistrust in infancy, autonomy vs shame in early childhood, initiative vs guilt in preschool years, industry vs inferiority in school-age children, identity vs role confusion in adolescence, intimacy vs isolation in early adulthood, generativity vs stagnation in middle adulthood, and ego integrity vs despair in late adulthood. The document also briefly defines social development and introduces the topic of psychosocial theory and human growth and development.