... against property, is it theft, or illegal appropriation, or fraud? And the entire apparatus of practical criminal justice forgets at once the first problem, which occupies the majority of the public ... introduction to the study of the psychology of the criminal, which is precisely the one problem that is of direct and immediate importance. It is this problem which the lawyer and the public prosecutor ... think that they can understand them without any other means. On the contrary, positive science, backed by the testimony of anthropology and of the study of the environment, has arrived at the following...