"[T]he main work of life lies in carrying on worthily the great common task of civilization: to play one's due part in the enterprise of feeding some hundreds of millions of men, in seeing that they are protected against violence and fraud, that they have access to justice, and as far as may be to education, that they have some freedom to pursue life and happiness, and are not cut off altogether from the wonders and beauties of the world and the mind of man. To succeed in doing this is civilization: to fail is the defeat of civilization. For civilization is, ultimately, the process whereby a human society in search, as Aristotle puts it, of a "good life for man", gradually overcomes the obstacles, material and other, that stand in its way and makes man increasingly master of his environment."