This document provides an overview of Erik Erikson's psychosocial stages of development theory. It begins with biographical information about Erikson, noting he was influenced by Freud and developed his eight stages of psychosocial development based on clinical observations of children. The stages are then described in detail, from trust vs. mistrust in infancy to integrity vs. despair in late adulthood. Assessment methods for Erikson's theory and additional works expanding on it are also mentioned.