A variety of scientific disciplines deal with different aspects of human development. For some time now, these fields have been merging into what is known as developmental science. Psychoanalysis also makes a significant contribution to this by examining unconscious, social, and emotional processes. This handbook summarizes the history of psychoanalytic developmental science and provides an overview of its most important concepts and models. It not only offers a theoretical foundation but also expands on this with practical psychoanalytic applications for people of all ages. Contributions from Andreas Bachhofen, Calvin A. Colarusso, Fitzgerald Crain, Margit Datler, Wolfram Ehlers, Ludwig Janus, Eva Kahlenberg, Katrin Luise Laezer, Fernanda Pedrina, Meinolf Peters, and Gerald Poschesc.