This spirit is the force that lifts man above the beasts and makes his civilization.

There is no mercy in brute nature.

The hawk eats the sparrow; the fox devours the young rabbit; the cat leaps from under a bush and kills the mother robin while the young are left to starve in the nest.

There is neither right nor wrong among the brutes because they have no moral sense.

They do not kill for revenge nor torture for the love of cruelty, as Comrade Bannerman would in praying that the train be wrecked and the rich men burned to death in the ruin.