The Italians have always had a taste for juridical studies. Their school of criminologists has placed itself at the head of the movement which ought to result in the reform of all criminal codes. Two principal tendencies are predominant in the works of this school: the physicians and anthropologists, for example M. Lombroso, have conformably to their mental tendencies, particularly studied the _criminal_, of whom they have endeavored to fix the type; the jurists, like M. Garofalo, vice-president of the civil tribunal of Naples, consider by preference the _crime_, which they determine by reference to our social organisation. M. Garofalo shows himself at once an innovator, in that he endeavors to give a positive definition of crime, to take the place of the vague and incomplete definition which was accepted by the old jurists, and conforming to which anthropologists have thought themselves able to mark the characteristics of the criminal man. That definition has relation to the average morality of the societies of to-day; crime or criminal offence is to be sought, according to him, only in the violation of altruistic sentiments acquired and consolidated in the average social individual—compassion and probity. New categories ought then to be established; that of "revolutionists," for example, with whom the offence does not proclaim moral monstrosity. The violation of altruistic sentiments certainly reveals in the offender a grave anomaly; it marks him as not adapted to the conditions of society, and even incapable of adapting himself to them, in consequence of psychical and physiological irregularities. The principle, then, is correct, although M. Garofalo has based it on an analysis of sentiments which appears to me insufficient. The sympathetic emotions which compassion embraces, are not the only source of our moral activity; probity arises in part from intelligence, and the logical sense intervenes to give the form of justice or injustice to an act of passion. Now, feebleness of judgment becomes, incidentally, an important element of the diagnosis of the criminal. Let us agree, nevertheless, that the absence of compassion and of probity upon the whole makes up the "natural crime." This suffices surely in practice.