In other words, divorce is but a symptom of more serious evils, and these evils have in certain classes of American society apparently undermined the very virtues upon which the family life subsists. This is not saying that vice is more prevalent to-day than it was fifty years ago. We have no means of knowing whether it is or not, and there may well be a difference of opinion upon such a subject. It is the opinion of some eminent authorities that there has been no growth of vice in the United States along with the growth of divorce, but this would seem to be doubtful. The very causes for which divorce is granted suggest a demoralization of certain classes. While there may not have been, therefore, any general growth of vice in the United States along with the growth of divorce, it is conceivable that it may have increased greatly in certain classes of American society. Be this as it may, it is not necessary to assume that there has been any growth of vice in the American population, for if actual moral practices are no higher than they were fifty years ago that alone would be a sufficient reason to explain considerable disintegration of our family life. It is an important truth in sociology that the morality which suffices for a relatively simple social life, largely rural, such as existed in this country fifty years ago, is not sufficient for a more complex society which is largely urban, such as exists at the present time. Moreover, recognized moral standards within the past fifty years have largely been raised through the growth of general intelligence. It follows that immoral acts, which were condoned fifty years ago and which produced but slight social effect, to-day meet with great reprobation and have far greater social consequences than a generation ago. This is particularly true of the standards which the wife imposes upon the husband. For centuries, as we have already seen, the husband has secured divorce for adultery of the wife, but for centuries no divorce was given to the wife for the adultery of the husband; and this is even true to-day in modern England, unless the adultery of the husband be accompanied by other flagrant violations of morality. Conduct on the part of the husband, which the wife overlooked, therefore, a generation ago, is to-day sufficient to disrupt the family bonds and become a ground for the granting of a divorce. Even if vice, then, has not increased in our population, if moral practices are no higher to-day than fifty years ago, we should expect that this alone would have far different consequences now than then. The growth of intelligence and of higher and more complex forms of social organization necessitates realization of higher standards of conduct if the institutions of society are to retain their stability.