Intelligence and natural genius have been distributed by Nature so economically, and yet so liberally, that in society there is no danger of either a surplus or a scarcity of special talents; and that each laborer, by devoting himself to his function, may always attain to the degree of proficiency necessary to enable him to benefit by the labors and discoveries of his fellows.
Owing to this simple and wise precaution of Nature, the laborer is not isolated by his task.

He communicates with his fellows through the mind, before he is united with them in heart; so that with him love is born of intelligence.
It is not so with societies of animals.

In every species, the aptitudes of all the individuals--though very limited--are equal in number and (when they are not the result of instinct) in intensity.

Each one does as well as all the others what all the others do; provides his food, avoids the enemy, burrows in the earth, builds a nest, &c.

No animal, when free and healthy, expects or requires the aid of his neighbor; who, in his turn, is equally independent.
Associated animals live side by side without any intellectual intercourse or intimate communication,--all doing the same things, having nothing to learn or to remember; they see, feel, and come in contact with each other, but never penetrate each other.