Law of the Jungle

What elevates man above all other animals is the cognition that peaceful cooperation under the principle of the division of labor is a better method to preserve life and to remove felt uneasiness than indulging in pitiless biological competition for a share in the scarce means of subsistence provided by nature. Guided by this insight, man alone among all living beings consciously aims at substituting social cooperation for what philosophers have called the state of nature or bellum omnium contra omnes or the law of the jungle.

The Ultimate Foundation of Economic Science, p. 97