TWO:There are, however, certain limitations even to the supposed universality of the custom. For the Roman jurists did not consider a re-conviction as a circumstance in itself which justified aggravation of punishment; and all that can be gathered from some fragments in the Pandects and Code is, that some particular cases of repeated crimes were punished more severely than a first offence. But they were crimes of the same kind; and a man whose first crime[91] was a theft and whose second was an assault would not have incurred an aggravated penalty. It is the same to-day in the Austrian, Tuscan, and a few other codes: a second crime is only punished more severely as a second crime when it is of the same kind as the first, so that it would not suffice to prove simply a previous conviction for felony irrespective of the particular sort. There is also another limitation that has sometimes been recognised, for in the Roman law the rule of an increased penalty fell to the ground, if three years elapsed without offence between the punishment for one crime and the commission of a second.[49]The recognition of this regulation of resentment as the main object of punishment affords the best test for measuring its just amount. For that amount will be found to be just which is necessary; that is to say, which just suffices for the object it aims at��the satisfaction of general or private resentment. It must be so much, and no more, as will prevent individuals from preferring to take the law into their own hands[84] and seeking to redress their own injuries. This degree can only be gathered from experience, nor is it any real objection to it, that it must obviously be somewhat arbitrary and variable. Both Wladimir I., the first Christian Czar of Russia, and Wladimir II. tried the experiment of abolishing capital punishment for murder; but the increase of murders by the vendetta compelled them to fall back upon the old modes of punishment.[46] Some centuries later the Empress Elizabeth successfully tried the same experiment, without the revival of the vendetta, the state of society having so far altered that the relations of a murdered man no longer insisted on the death of his murderer. But had Elizabeth abolished all legal punishment for murder��had she, that is, allowed no public vendetta of any kind��undoubtedly the vendetta would have become private again.

TWO:Since, therefore, there is more to fear from a punished than from an unpunished criminal, there is the less reason to regret the general impunity of crime. There is indeed a large class of crimes for the prevention of which more would be done, by leaving them to their natural consequences, and to the strong power against them which the general interests and moral feelings of mankind will always enforce, than by actual punishment. It is particularly crimes of dishonesty which are best punished by the mere fact of their discovery. By the Norwegian law if an offender holds any official place he is punished, not by fine or imprisonment, but by the loss of his office and all the privileges connected with it.[59] And if we imagine a country without any legal penalty at all for theft or dishonesty, thieves and their tribe would soon find their proper punishment, by that process of social shifting, which would drive them to the most deleterious or dangerous occupations of life even more effectually than it so drives them at present. The less dependence is placed on the penal sanctions of crime, the stronger do the moral restraints from it become.