Pleasure and Social Instinct.—Through his relations with other men, man derives a new species of delight in those pleasurable emotions which his own personality affords him; whereby the domain of pleasurable emotions is made infinitely more comprehensive. No doubt he has inherited many of these feelings from the brutes, which palpably feel delight when they sport with one another, as mothers with their young. So, too, the sexual relations must be taken into account: they make every young woman interesting to every young man from the standpoint of pleasure, and conversely. The feeling of pleasure originating in human relationships makes men in general better. The delight in common, the pleasures enjoyed together heighten one another. The individual feels a sense of security. He becomes better natured. Distrust and malice dissolve. For the man feels the sense of benefit and observes the same feeling in others. Mutual manifestations of pleasure inspire mutual sympathy, the sentiment of homogeneity. The same effect is felt also at mutual sufferings, in a common danger, in stormy weather. Upon such a foundation are built the earliest alliances: the object of which is the mutual protection and safety from threatening misfortunes, and the welfare of each individual. And thus the social instinct develops from pleasure.