Psychosocial Theories of Human Behavior and Development: An Evolution of Big Ideas is about the major psychosocial theories of human development that were created in the 20th century, drawing from the diverse disciplines of developmental psychology, psychiatry, cognitive science, social psychology, sociology, ethology, and neuroscience. A central focus concerns the components of psychological and social development that motivate and influence human behavior over the lifespan. The evolution of the major ideas over time, their integration, and the ways in which their emergence was shaped by their mutual influences is emphasized throughout. Several integrative themes are used to provide linkages and contexts for the emergence of the theories, particularly the social influences on scientific discoveries, the integrative theoretical framework from the National Research Council, referred to as the transactional-ecological model, and an emphasis on the historical evolution of the sources of knowledge on which the theories were based. A major goal of the book is to teach, in addition to the major concepts of growth and development, the historical scientific and social processes by which these organizations of concepts came into being. This integrative discussion creates important opportunities for more critical analysis and synthesis of ideas.