The difficulty of satisfying these various desires at the same time is the primary cause of the despotism of the will, and the appropriation which results from it.

On the other hand, man always needs a market for his products; unable to compare values of different kinds, he is satisfied to judge approximately, according to his passion and caprice; and he engages in dishonest commerce, which always results in wealth and poverty.

Thus, the greatest evils which man suffers arise from the misuse of his social nature, of this same justice of which he is so proud, and which he applies with such deplorable ignorance.
The practice of justice is a science which, when once discovered and diffused, will sooner or later put an end to social disorder, by teaching us our rights and duties.
This progressive and painful education of our instinct, this slow and imperceptible transformation of our spontaneous perceptions into deliberate knowledge, does not take place among the animals, whose instincts remain fixed, and never become enlightened.
"According to Frederic Cuvier, who has so clearly distinguished between instinct and intelligence in animals, 'instinct is a natural and inherent faculty, like feeling, irritability, or intelligence.

The wolf and the fox who recognize the traps in which they have been caught, and who avoid them; the dog and the horse, who understand the meaning of several of our words, and who obey us,--thereby show _intelligence_.
The dog who hides the remains of his dinner, the bee who constructs his cell, the bird who builds his nest, act only from _instinct_.

Even man has instincts: it is a special instinct which leads the new-born child to suck.