"Feudalism, too, had its proletariat--the villeinage--which contains all the germs of the middle class. Feudal production, too, had two contradictory elements which are likewise characterised as the 'good' and 'bad' sides of feudalism without regard to the fact that it is always the 'bad' side which triumphs ultimately over the 'good' side. It is the bad side which calls into being the movement which makes history, in that it brings the struggle to a head. If, at the time of the supremacy of feudalism, the economists, in their enthusiasm for knightly virtues, for the beautiful harmony between rights and duties, for the patriarchal life of the towns, for the flourishing home industries in the country, for the development of industry organised in corporations, companies and guilds, in a word, for everything which forms the finer side of feudalism, had set themselves the problem of eliminating everything which could throw a shadow on this picture--serfdom, privileges, anarchy--where would it all have ended? They would have destroyed every element which called forth strife, they would have nipped in the bud the development of the middle class. They would have set themselves the absurd problem of blotting out history. "When the middle class had come to the top, neither the good nor the bad side of feudalism come into question. The productive forces, which had been developed under feudalism through its agency, fell to its control. All old economic forms, the legal relations between private individuals, which corresponded to them, the political order, which was the official expression of the old society, were shattered." "Those Socialists and social revolutionaries who regard the hardships and struggles of society as an absolute evil and plan the construction of a society comprised solely of good elements, have not grasped the meaning of the history of mankind. They think abstractly. They misjudge both the past and the present. "Hence to form a correct judgment of production under feudalism one must consider it a method of production based upon contradiction. One must show how wealth was produced within this contradiction, how productive power developed contemporaneously with the antagonism of classes, how one of these classes, the bad side, the social evil, constantly increased until the material conditions for its liberation were fully ripe. "Does that not show clearly enough that the means of production, the conditions under which productive power is developed, are anything but eternal laws, that they rather correspond to a definite stage in the evolution of mankind and of its productive power, and that a variation in the productive power of mankind necessarily brings about a variation in its conditions of production?