Offspring may come to be reflectively desired by the individual as a means of perpetuating property, family, or fame. A man cannot nonchalantly face the prospect of obliteration, and the biological fact of death may be circumvented by the equally real fact of reproduction. A man's individuality, we have already had occasion to see, is enhanced by his possessions, and if his fortune or estate is handed down he shall not altogether have been obliterated from the earth. Similarly, where a family has become a great tradition, there may be a deliberate desire on the part of an individual to have the name and tradition carried on, to keep the old lineage current and conspicuous among men. A man may think through his children to keep his own fame alive in posterity. At least his name shall be known, and if, as so often happens, a son follows in his father's profession, carries on his father's business, farm, or philanthropies, the individual attains at least some measure of vicarious immortality. His own ways, habits, traditions are carried on.
A man may, moreover, come to desire offspring for the pleasures and responsibilities of domesticity and parenthood. There is a parental instinct as such, certainly very strong in most women, and not lacking to some degree in most men. The joys of caring for and rearing a child have too often been celebrated in literature and in life by parents both young and old to need more explicit statement here.
RESTRICTION OF POPULATION. But reproduction has been in human history promiscuous, and increase of population has been less a problem to moralists and economists than has its restriction. The danger of over-increase in population was first powerfully stated by Malthus in his _Essay on Population_. Malthus contended in effect that population always tends to increase up to the limit of subsistence, and gives indications, unless increase is checked, of increasing beyond it. In its extreme form, as it appeared in Malthus's first edition of his _Essay_, it ran somewhat as follows:
As things are now, there is a perpetual pressure by population on the sources of food. Vice and misery cut down the number of men when they grow beyond the food. The increase of men is rapid and easy; the increase of food is in comparison, slow, and toilsome. They are to each other as a geometrical increase to an arithmetical; in North America, the population double their number in twenty years.[1]