Next among the facts which account for the existence of relatively separate groups of wage earners are those which are usually summed up under the phrase inequality of opportunity. Equality of opportunity in the way of education and training, and in the way of healthy and strengthening environment would have to be assured before the theory of a general rate of wages could possibly apply. This equality of opportunity is not realized in the United States to-day.

The United States has been the scene of continuous and heavy immigration. The mass of this immigration entered into the field of unskilled labor. The great majority of these workers because of the partly unavoidable handicap of their strangeness, and their ignorance of American life, and because of their poor education, did not have equal chances with the older inhabitants to rise in the industrial scale. They could not possibly make the same use of the common opportunities—even if their natural ability were on a par with those of the older inhabitants. Furthermore, the rapid growth of our great cities and the accompanying social changes, the growth in the size of the average industrial enterprise, and the progress of standardization have all lessened equality of opportunity. The chances of the children born in the lowest industrial groups to discover and fairly test their natural abilities have declined in relation to the chances of the children more fortunately born. These conditions have certainly checked the working out of those forces on which the theory of a general rate of wages rests.

Thirdly, there is the fact that certain forms of work on which youthful labor is employed, give no preparation and training for the further stages of life and work; and these blind alley employments are filled by children born in the lowest industrial groups.

Then there are the barriers of different kinds to free movement throughout all parts of the field of employment. There are the barriers of sex which have added to the crowding of certain occupations and industrial grades. There are the barriers of race and religion, which have affected the flow of labor between different industries. Lastly, there is the barrier of color, which has prevented the negroes from developing their natural ability. These barriers may be well justified, in part or in whole, by other considerations. That question need not be considered here. But they certainly contribute to the formation of relatively separate groups of wage earners, with different levels of earnings.

4.—The existence and activities of labor unions are still another factor in the formation of relatively separate groups. In many cases labor organization tends to follow closely the lines of separation or unity established by the other causes of group separation or unity. There is often a tendency for a single union to include within its limits the whole of a group within which all the conditions underlying the idea of a general rate of wages are well fulfilled; or for various unions to merge or act together, if these conditions are well fulfilled between them. G. D. H. Cole has given a case in point. "Clearly the ease with which an industrial union can come into being depends upon the sharpness of the distinction between the skilled and unskilled in the industry concerned. Thus in the mining and textile industries, as we have already noted, there is no very sharp distinction between the two classes of workers. In mining, the boy who enters the pit has every chance of passing before many years have gone by into the ranks of the coal getters, who form the skilled section of the mining community. There is no sharp division or cleavage of interest between the main sections of the mining community. Promotion runs easily from one grade to another, and therefore, it is easier to realize a form of combination in which all the various sections are grouped together in a single industrial organization."[33]...

This tendency, however, has not been perfectly realized by any means. It often happens that the scope of a labor union will coincide with the underlying facts of unity at one time, but not permanently. The limits of particular trade unions have sometimes been set by an accident of time or place; by some episode in union history. The internal politics of the union movement has been the decisive factor in still other instances. Furthermore, industrial conditions are constantly changing and creating new lines of group separation or unity, which may vary from the lines of the existing labor unions.

Labor organization affects the formation of relatively separate groups of wage earners both directly and indirectly. First as to its direct influence. A labor union is a combination of a number of individuals, formed with the intention of advancing the material welfare of the group and for such wider purposes as the group may agree upon. The chief peaceful method of unionism is collective bargaining; its chief combative method is the strike. Labor unionism is a factor in the formation of relatively separate groups of wage earners, because each autonomous, or practically autonomous, trade union is a point of pressure upon the distributive mechanism. Each trade union strives to turn the balance of distribution in its own direction. This it does in a variety of ways.

It may by its wage demands test out the nature of the demand for the products of its labor. It strives to force the price of these products up to the point which seems to promise the greatest wage income for the group. It may by its pressure on the employer bring about a revision of productive methods. It seeks by its strength to secure that portion of the product which, in its view, goes to the strongest contender for it. Unions, indeed, sometimes strive to restrict the flow of labor into their craft or industry by deliberate regulation or silent obstruction. Such instances are less important than formerly in all probability. On occasion unions may even play a part in determining the field of employment for their members. Thus G. D. H. Cole points out that in England the trade unions do not recognize "differences between skilled and less skilled workers as demarcation disputes, and do not recognize the right of unskilled workers to raise such cases against skilled unions. In fact, the skilled unions virtually claim the right to do such work as they think fit, and so far as they can enforce their claim, to exclude the less skilled where they think fit."[34] Again unionism may indirectly through its wage policy cause a slowing up of recruiting of new men into the craft or industry. In short, by every means at its command, a union strives to assert the importance of its group as against other interests. Thus, in respect to the activities just described, unionism must be included among the influences which lead to the formation and maintenance of relatively separate groups of wage earners.

On the other hand, trade unionism in many indirect ways tends to have an effect in the opposite direction. By a constant adherence to certain broad policies, the trade union movement may contribute much to a realization of the conditions on which the idea of a general rate of wages is based. Such, for example, is the emphasis played by the trade union movement upon free and compulsory education, and the raising of the age of entry into industry. Such, also, is its advocacy of social legislation which is aimed to give more nearly equal opportunity to the lowest grades of industrial workers. Or, to take a third example, such is the result of the aid given by the skilled trade unions to the unskilled workers in their efforts to organize. Unionism works against the formation of relatively separate groups of wage earners to the extent that its activities contribute towards the achievement of equality of opportunity for all wage earners, and to the extent that the strong groups come to the assistance of the weaker.

5.—The main cause of the formation of relatively separate groups of wage earners, with different, though closely related levels of earnings have now been considered. As a result of these influences, it must be concluded that the determination of the wage level of each of the various groups of wage earners is a sufficiently independent process to make it necessary to account for it as such. The various groups of wage earners have relatively separate economic careers so to speak. The economic fortune of each group is not settled merely as part of one general process, though the economic fortunes of all are intimately connected. The wage situation is not to be explained as consisting of one basic level of wages with a series of equalizing differences; but rather as consisting of a series of wage levels, all of which are governed to a considerable extent by the same forces or conditions.[35]