It has already been suggested, that the desire to limit families is due to a consciousness of responsibility on the part of prospective parents. They realise the stress of competition in the struggle for existence, they are anxious for their own pecuniary and social stability, and even more anxious that the children, for whose birth they are responsible, should be provided with the necessities and comforts of life which health and development require. They are eager, too, that their children should be equipped with a good education, and thus be given a fair advantage in the race of life. To the great mass of people this is possible only when the numbers of the family are limited. As the numbers of the family increase, the difficulties of clothing and feeding and educating increase, and each member is the poorer for every birth, and in this sense an increasing birth-rate is a cause of poverty. The sense in which poverty causes a high birth-rate will be dealt with later on. It will be readily conceded, that those actuated by the motives just considered, those with the keenest sense of responsibility in life, those capable of exercising the self-restraint which family limitation requires, constitute the best type of citizens in any community. From such the State has good reason to expect the best stock. It is one purpose of this work to show that this class, which can and should produce the best in the largest numbers, is being overwhelmed with the burden of supporting an ever-increasing number of incapables, and, largely in consequence of this increasing burden and responsibility, are unwilling to produce, because they are unable adequately to support their own kind. There is a class in every large community, whose sense of responsibility in life is at zero, whose self-control is substituted by the law and its sanctions, and whose modes and habits of life are little better than those of the lower animals. Their appetites are stronger, their desires, though fewer, are more intense, and their self-control less easily and less frequently exerted than those in the highest planes of life. In the first place then they have less desire to limit their families, and less power to exercise the self-restraint that is necessary to do so. Less sense of responsibility is attached to the rearing of a family, whilst the education of their children gives them little or no concern. They entertain no ambition that members of their family should compete in the struggle for social status. Their instincts and their impulses are their guide in all things. They marry early, and procreation is unrestrained except by the hardships of life.