This volume highlights identity development from early adolescence through late adulthood and provides a valuable resource for university students as well as human services professionals. This Second Edition of Identity Development: Adolescence Through Adulthood presents an overview of the five general theoretical orientations to the question of what constitutes identity, as well as the strengths and limitations of each approach. The volume then describes key biological, psychological, and contextual issues during each phase of adolescence and adulthood. Following these major adolescence and adulthood sections, selected issues that may pose identity challenges for some are presented.