First, then, the crimes against property. The author recognizes that most of these crimes are caused by bad economic conditions. But it is an exaggeration, he says, to say that all these crimes result from such conditions. This is to overlook crimes against property committed out of revenge. However, in a communistic society there would necessarily be cases of theft still, without taking into account kleptomania, etc. For the articles of consumption would still remain private property; and why should one not rob his fellow-citizen from jealousy? Or is it not probable that someone would prefer to take from his neighbor the thing he needs rather than make a trip of some miles to get it from a central store? But if we admit that the bad economic conditions of the time are the cause of the crimes against property, it remains to find the causes of the crimes of the other groups. Though he recognizes that economic conditions occupy a place in the etiology of these last crimes, as, for example, murder from cupidity, the author does not believe that this can be made a general rule. When socialists object that the man of the future will be morally improved, Professor Ferri is of the opinion that at the present moment we have to do with the men of today and not with the men of the future. The study of criminality in France during the years 1825–80 has shown an extraordinary increase in crimes against persons and against morals during the years 1848–52. A minute examination shows the author that it was due to the great increase in the consumption of meat and wine, both very cheap at this time, and also to a rise in wages. The result of the betterment in economic conditions was, therefore, an increase in the crimes mentioned. Professor Ferri finds another proof in the following table: Number of Persons Arraigned to 100,000 of Each Class (France).