This book analyzes the middle years of the lifespan, discussing the many different facets of adult development. This text studies the various changes experienced by middle-aged adults, explaining how these different experiences interrelate, and how a better understanding of them can foster successful midlife development. Using a diverse set of longitudinal data, the volume aims to provide a broad perspective by examining the similarities and differences in the midlife experience as a function of gender, social class, and birth cohort. The book offers advice on the enormous potential and promise which is possible amid the gains and losses of the middle years.