In the Russian-language scientific literature, a person in adulthood is undeservedly poorly represented. The goal of this book was to fill this gap whenever possible. The paper analyzes the signs of mature age, the possibilities of self-realization at this stage of ontogenesis, presents quantitative and qualitative data on the stated problem. The book will be useful for students, undergraduates, graduate students studying in sociology, psychology, anthropology. And also to everyone who is interested in the problems of adulthood.