Adult development refers to the psychological, emotional, and social growth that individuals experience from young adulthood through old age. This process involves various stages, each characterized by unique challenges and milestones, such as forming intimate relationships, pursuing careers, and adapting to life changes. Theories by psychologists like Erik Erikson highlight the importance of resolving conflicts at each stage to foster healthy development. Throughout adulthood, individuals may encounter transitions such as marriage, parenthood, and retirement, which can influence their identity and life satisfaction. Factors like cultural background, socioeconomic status, and personal experiences play significant roles in shaping adult development, affecting how people navigate these changes and achieve personal growth.