This article provides a critical review of the literature on psychosocial development in adolescence, a developmental period characterized by a complex interplay of biological, cognitive, and socio-relational transformations. Drawing on the clinical observations of Dr. Maria Anna Formisano, the essay explores the three pillars of adolescent development: identity construction, the renegotiation of social relationships with family and peers, and the architecture of protective factors that promote resilience. The analysis systematically integrates these observations with key theoretical models of developmental psychology, such as Erikson's epigenetic theory, Marcia's identity states, neurobiological models of risk-taking behavior, Bowlby's attachment theory, and Baumrind's typologies of parenting styles. Special attention is paid to the impact of the digital context on identity and relational construction. The final argument maintains that adolescence, despite being a phase of intrinsic vulnerability, represents a crucial opportunity for the development of lifelong skills, the outcome of which is modulated by the dynamic interaction between individual and contextual resources.