In our purely sociological work, though it combats in an indirect way the hypothesis of the Italian school, we do not have to concern ourselves with the conflict between the different anthropological schools, with regard to the origin of crime. We demonstrate merely, what no one who judges fairly will attempt to deny, that the hypothesis of the Italian school is erroneous. The anthropological authorities like Manouvrier, Baer, Näcke, and others, have broken this doctrine down. [113] There are no stigmata belonging to criminals only, nor is there any criminal type; the atavistic hypothesis is one of the profoundest errors. Although the doctrine of Lombroso and his school is in general abandoned by anthropologists, it still persists in the acceptance of one fact, to which it is its immortal merit to have called attention, namely that there are a number of criminals (though a very limited number) who show a truly pathological nature, and whose criminal character can only be explained by this pathological nature. For example, when someone in an epileptic condition commits a murder, without any motive; or the case in which a well-to-do individual steals continually useless articles, of little value, etc., etc. Even in most of these instances, which are a small minority in the colossal mass of criminality, the social environment plays its part; but it must be recognized without reserve that here we have to do with true individual factors, peculiar to certain individuals. The hypothesis of the Italian school is, then, accurate for the exception, but false as a rule.— PHYSICAL FACTORS. It is evident that the nature of the soil, the climate, the physical environment in a word, must have an important influence upon the mode of production, and consequently upon society. [114] It is easily understood why those who inhabit the regions of Siberia covered with snow have not become agriculturists; and why Holland, without mines of iron and coal has not become a great manufacturing country, but instead, situated upon the sea and traversed by great rivers, has become commercial. But these physical factors have remained constant or nearly constant during historical periods, while the organization of society has undergone changes that have great effects. We cannot explain these changes by a constant factor.