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(from Part 2, pp. 113-118)

verything begins to change its aspect. Men who had previously been wandering around the woods, having once adopted a fixed settlement, come gradually together, unite in different groups, and form in each country a particular nation, united by customs and character - not by rules and laws, but through having a common way of living and eating and through the common influence of the same climate. A permanent proximity cannot fail to engender in the end some relationships between different families. Young people of opposite sexes live in neighbouring huts; and the transient intercourse demanded by nature soon leads, through mutual frequentation, to another kind of relationship, no less sweet and more permanent. People become accustomed to judging different objects and to making comparisons; gradually they acquire ideas of merit and of beauty, which in turn produce feelings of preference. As a result of seeing each other, people cannot do without seeing more of each other. A tender and sweet sentiment insinuates itself into the soul, and at the least obstacle becomes an inflamed fury; jealousy awakens with love; discord triumphs, and the gentlest of passions receives the sacrifice of human blood.