This document provides an overview of Erik Erikson's theory of psychosocial development. It discusses the eight stages of development from infancy through adulthood. Each stage involves a psychosocial conflict that must be resolved. Successful resolution of each prior stage is important for healthy development. The stages discussed include trust vs mistrust in infancy, autonomy vs shame and doubt in early childhood, initiative vs guilt in middle childhood, industry vs inferiority in middle childhood, identity vs role confusion in adolescence, intimacy vs isolation in early adulthood, generativity vs stagnation in mature adulthood, and integrity vs despair in old age.