Professor Ferri draws the conclusion that the social environment is circumscribed by economic conditions for the most part, and that these have a very great influence upon criminality. The socialists and the evolutionary sociologists differ, then, in this, that the first believe they can make themselves useful by protesting and prophesying, while the others think that it is more practical and more scientific to apply themselves to partial improvements. —One cannot read this chapter without being astonished at the decided tone with which the author declares himself against a theory which he only knows from what he has heard said about it. The classic formula of historic materialism is quoted at second hand from a criticism of Professor Loria upon a work of Puviani, who says that the economic evolution is in its turn determined by the constant increase of the population (a theory entirely opposed to that of Marx). And how the idea of this theory is treated! Let the reader judge for himself. In the original we read: “In the social production of their life men enter into fixed, necessary relationships in production, independent of their will, relationships which correspond to a definite stage in the development of their material powers of production. The sum total of these relationships forms the economic structure of society, the real basis upon which the juristic and political superstructure is erected, and to which definite forms of social consciousness correspond. The form of production of the material life conditions the social, political, and intellectual life-process in general. It is not the consciousness of mankind that determines their being, but their social being that determines their consciousness.” [125] 3