"The hospitality of primitive peoples, respect for human life, the sense of reciprocal obligation, compassion for the weak, courage, extending even to the sacrifice of self for others which is first learnt for the sake of children and friends, and later for that of members of the same community — all these qualities are developed in man anterior to all law, independently of all religion, as in the case of the social animals. Such feelings and practices are the inevitable results of social life. Without being, as say priests and metaphysicans, inherent in man, such qualities are the consequence of life in common. But side by side with these customs, necessary to the life of societies and the preservation of the race, other desires, other passions, and therefore other habits and customs, are evolved in human association. The desire to dominate others and impose one's own will upon them; the desire to seize upon the products of the labor of a neighboring tribe; the desire to surround oneself with comforts without producing anything, while slaves provide their master with the means of procuring every sort of pleasure and luxury — these selfish, personal desires give rise to another current of habits and customs."