Tailored complexity (and not tout-court complexity) has a fundamentally subjective content. It is known that almost all important decisions in our lives are not scientific in nature, but are often accidental, have unforeseen consequences and make our life more intricate than any novel. And the scientific value of the social sciences is not comparable to that of the natural sciences. One of the central theses of the book is that each of us, faced with the complexity of reality, makes choices (more or less conscious) to build their own vision of the world made by the number and intensity of their relationships, using appropriate language (narrative rather than paradigmatic) and taking advantage of the extraordinary abundance of opportunities available today to an increasing number of people. In this volume the author invites us to reflect on the processes of understanding the world, on the modeling of organizational realities as complex systems, on forecasting, conjecture and imagination as tools for building scenarios, and finally on the economy as a complex discipline.