Heinz Werner was one of the most original thinkers of the twentieth century in the field of developmental psychology. His theory, based on the orthogenetic principle, microgenesis, and symbol formation, offers a profoundly integrative perspective that challenges the reductionist, mechanistic, and linear models that have dominated contemporary psychology. This final chapter shows how the principles of human development proposed by Werner are more relevant than ever and how they have been extended to different fields and areas of psychological research. It also proposes an articulated synthesis of his main contributions and presents an integrative analysis of the different contributions within this book.