اما هر کار می‌کنی، از فلسفه نمیر. - Will Durant

History is a process of rebarbarization. A people made vigorous by arduous physical conditions of life, and driven by the increasing exigencies of survival, leaves its native habitat, moves down upon a less vigorous people, conquers, displaces, or absorbs it. Habits of resolution and activity developed in a less merciful environment now rapidly produce an economic surplus; and part of the resources so accumulated serve as capital in a campaign of imperialist conquest. The growing surplus generates a leisure class, scornful of physical activity and adept in the arts of luxury. Leisure begets speculation; speculation dissolves dogma and corrodes custom, develops sensitivity of perception and destroys decision of action. Thought, adventuring in a labyrinth of analysis, discovers behind society the individual; divested of its normal social function it turns inward and discovers the self. The sense of common interest, of commonwealth, wanes; there are no citizens now, there are only individuals. From afar another people, struggling against the forces of an obdurate environment, sees here the cleared forests, the liberating roads, the harvest of plenty, the luxury of leisure. It dreams, aspires, dares, unites, invades. The rest is as before. Rebarbarization is rejuvenation. The great problem of any civilization is how to rejuvenate itself without rebarbarization.

The invention and spread of contraceptives is the proximate cause of our changing morals. The old moral code restricted sexual experience to marriage, because copulation could not be effectively separated from parentage, and parentage could be made responsible only through marriage. But to-day the dissociation of sex from reproduction has created a situation unforeseen by our fathers. All the relations of men and women are being changed by this one factor; and the moral code of the future will have to take account of these new facilities which invention has placed at the service of ancient desires.

قوة التقاليد تتناسب تناسباً عكسياً مع كثرة القوانين، كما أن قوة الغريزة تتناسب تناسباً عكسياً مع كثرة الأفكار