normal times. Recognition of this fact effectually destroys much criticism of the theory. The interest of the wage-worker, as wage-worker, is to receive the largest wage possible for the least number of hours spent in labor. The interest of the employer, as employer, on the other hand, is to secure from the worker as many hours of service, as much labor power, as possible for the lowest wage which the worker can be induced to accept. The workers employed in a factory may be divided by a hundred different forces. They may be divided by racial differences, for instance; but while preserving these differences in a large measure, they will tend to unite upon the basis of their economic interests. Some of the great labor unions, notably the United Mine Workers,[118] afford remarkable illustrations of this fact. If the difference of religious interests leads to division, the same unanimity of economic interests will sooner or later be developed. No impartial investigator who studies the influence of a great labor union which includes in its membership workers of various nationalities and adherents of various religious creeds, can fail to observe the fact that the community of economic interests which unites them is a powerful factor making for their amalgamation into a harmonious civic whole. With the employers it is the same. They, too, may be divided by a hundred forces; the competition among them may be keen and fierce, but common economic interests will tend to unite them against the organizations of the workers they employ. Racial, religious, social, and other divisions and distinctions, may be maintained, but they will, in general, unite for the protection and furtherance of their common economic interests. So much, indeed, belongs to the very primer stage of economic theory. Adam Smith is rather out of fashion nowadays, but there is still much in "The Wealth of Nations" which will repay our attention. No Socialist writer, not even Marx, has stated the fundamental principle of the antagonism between the employing and employed classes more clearly, as witness the following:--