Erik Erickson defined psychosocial development based on eight stages ranging from birth to death. Each stage defines an on-going pattern of psychosocial growth. In order of appearance, the eight stages are Trust vs. Mistrust, Autonomy vs. Shame and Doubt, Initiative vs. Guilt, Industry vs. Inferiority, Identity vs. Role Confusion, Intimacy vs. Isolation, Generativity vs. Stagnation, and Ego Integrity vs. Despair.