This document summarizes Erik Erikson's eight stages of psychosocial development from infancy to late adulthood. Each stage involves a psychosocial crisis where the individual develops a virtue if the crisis is successfully navigated, or an associated weakness if unsuccessfully navigated. The stages are: (1) Infancy (Trust vs Mistrust), (2) Toddlerhood (Autonomy vs Shame/Doubt), (3) Preschooler (Initiative vs Guilt), (4) Grade Schooler (Industry vs Inferiority), (5) Adolescence (Identity vs Role Confusion), (6) Young Adulthood (Intimacy vs Isolation), (7) Middle Adulthood