If we consulted only the criminal statistics we should hardly ever meet with adultery. It is unnecessary to add that the penal laws dealing with this matter are so drawn up that a prosecution for adultery almost never takes place; it goes without saying, however, that in reality the offense is very common.
In the first place we must look into the question of the classes of society in which the offense occurs oftenest. Though there are no statistics on the matter I believe that we shall not be far wrong in saying that adultery takes place oftenest in that part of the bourgeoisie that lives in idleness, often also among the proletariat, and least often among the intellectual bourgeoisie and the petty bourgeoisie. In seeking for the causes of this fact we see clearly that they cannot be found in the man himself, for the individuals forming these classes do not differ as to their innate characteristics. Consequently, these causes must be found in the environment; the following being the principal ones.
First. The more marriage is contracted for convenience the greater the danger of adultery. This is one reason why adultery is more common among the “upper ten thousand”, where marriage is often a commercial affair, and why it is less frequent among the intellectual bourgeoisie, in which there are more marriages of inclination.
Second. The more frivolous and trifling the life any class leads, the more frequent will adultery be in it. This is another reason why [[611]]adultery is frequent among the idle rich, and less frequent in the intellectual class and the petty bourgeoisie.
Third. The more the social causes of marriage are felt in a certain class, the greater the moral aversion to adultery. This is one reason why this offense is found less often among the petty bourgeoisie than in the working class.
Fourth. The greater the number of marriages concluded for purely physical reasons without any intellectual reasons entering in, the more numerous will be the cases of adultery. This applies especially to the proletariat, among whom most of the marriages are contracted from affection, but where, because of lack of culture, there is often no possibility of intellectual communion. When this harmony is lacking it comes about that the difficulties of life, so great in this class, cause an estrangement from which infidelities frequently result.
Finally, let us consider briefly the question of which individuals in the different classes are guilty of adultery. The predisposition to polygamy is not the same for all. In the second place, the sexual instincts are much more intense in some cases than in others. In the third place the environment in which one has lived is not the same as that of another, and opportunities do not occur in the same way for each. The joint action of these causes explains sufficiently why one commits the offense in question and not another.
In setting forth the etiology of adultery we have been giving the reasons why it has been designated as a crime. Little by little the conception of marriage has been modified in consequence of the social changes that have taken place; there is a growing number of persons who consider the life in common permissible only when both parties desire it without being constrained by the law. The partisans of this opinion disapprove of adultery, but for different reasons from others, who consider it as the infraction of an acquired right. Professor Ferri formulates this new morality as follows. “What is vile about adultery is not that it is an assault upon individual property, it is the disloyalty of the act, the trickery and hypocrisy of it.”[471]
While finding adultery immoral the adherents of this opinion believe that the law has no right to interfere. Even the persons who do not share their point of view believe that the penal code should cease to concern itself with this crime. Hence it comes, among other things, that the laws are so drawn that prosecutions are very rare. It is probable that adultery will disappear from the list of offenses. [[612]]