Socialization is the lifelong process through which individuals acquire the norms, values, behaviors, and social skills necessary to function within their society. This complex process involves multiple interacting factors including biological predispositions, psychological development, and cultural influences. The text presents four major theoretical frameworks for understanding socialization: Freud's psychoanalytic theory emphasizes the development of personality structures (id, ego, superego) and their role in balancing individual desires with social expectations; Piaget and Kohlberg's cognitive theories outline progressive stages of moral reasoning development; Bandura's social learning theory highlights the importance of observational learning and modeling; while ethological perspectives consider evolutionary adaptations in human social behavior. The family emerges as the most influential agent of socialization, particularly in early childhood, with parenting styles (authoritative, authoritarian, permissive, and neglectful) significantly impacting children's social competence, self-esteem, and future relationships. Secondary socialization occurs through educational institutions that transmit cultural knowledge but may also reinforce social inequalities, and through mass media that increasingly shapes perceptions of social reality. The text also examines practical applications including intergenerational studies of parenting approaches and standardized assessment tools like the ESPA29 scale for evaluating adolescent socialization patterns. Contemporary challenges discussed include adapting socialization processes to diverse cultural contexts and addressing the growing influence of digital media on social development.