Erikson's stages of psychosocial development as articulated by Erik Erikson explain eight stages through which a healthily developing human should pass from infancy to late adulthood. In each stage the person confronts, and hopefully masters, new challenges. Each stage builds on the successful completion of earlier stages. The challenges of stages not successfully completed may be expected to reappear as problems in the future.
The stages:
Hope: Trust vs. Mistrust (Infants, 0 to 1 year)
Will: Autonomy vs. Shame & Doubt (Toddlers, 2 to 3 years)
Purpose: Initiative vs. Guilt (Preschool, 4 to 6 years)
Competence: Industry vs. Inferiority (Childhood, 7 to 12 years)
Fidelity: Identity vs. Role Confusion (Adolescents, 13 to 19 years)
Love: Intimacy vs. Isolation (Young Adults, 20 to 34 years)
Care: Generativity vs. Stagnation (Middle Adulthood, 35 to 65 years)
Wisdom: Ego Integrity vs. Despair (Seniors, 65 years onwards)