But if thirty years have worked wonders in Europe, and disintegration can be plainly detected in the social fabric, the course of social and political development in the United States has been still more remarkable. In 1875 the country was still a farming community living on the edge of a vast wilderness through which the railroad was just beginning to open a path. Thirty years have been sufficient to convert it into the greatest of manufacturing and commercial states. The occupation of the public lands, the establishment of industry on an hitherto undreamed of scale, the marvellous, almost overnight creation of enormous cities, all these have resulted in the production of a proletariat, cosmopolitan in its character, and with no traditions of other than cash relations with the class which employs it. The purity of the economic fact is unobscured. Hence a socialistic agitation has arisen in the United States, the enthusiasm of which vies with that in any of the European countries and the practical results of which bid fair to be even more striking. This movement has arisen almost spontaneously as the result of economic conditions. It is a natural growth not the result of the preaching of abstract doctrines or the picturing of an ideal state. The modern American proletariat is, as a matter of fact, given neither to philosophic speculation nor to the imagination which is necessary to idealism. Such socialism as it has adopted it has taken up because it has felt impelled thereto by economic pressure. Hence, apart from all socialistic propaganda, a distinct disintegration-process has been proceeding in modern society. Each epoch carries within itself the seeds of its own dissolution. Things have just this much value, they are transitory, says Engels in his paraphrase of Hegel, and this is in fact the central idea of his dialectic philosophy.