This book lays the theoretical foundation for the existence of a science or scientific discipline that is Criminology. It gives an overview of the theoretical debate which is based on an agreement or a relative consensus in the concerned scientific community on four points: the date of birth of the discipline, its name, a status of autonomous science and the objects which it proposes to study. From this fourfold point of view, it should be noted, criminology not only does not have its own object-domain, but also does not have its own theories, let alone concepts. So that the socio-criminologist, the psychologist-criminologist as well as the sociologist and the psychologist all study the same objects, the criminalized behavior or the social reaction, and mobilize the same theories and sometimes the same concepts.In short, this book provides the reader with sufficient criminological knowledge to be able to actively participate in the reflections related to the criminal phenomenon in the broad sense of the term.