The great centralized trade unions of Germany developed in direct dependence upon the development of national industry, adapting themselves to its successes in the home and the foreign markets, and controlling the prices of raw materials and manufactured products. Localized in political districts to adapt itself to the election laws and stretching feelers in all cities and rural communities, the Social Democracy built up the unique structure of the political organization of the German proletariat with its many-branched bureaucratic hierarchy, its one million dues-paying members, its four million voters, ninety-one daily papers and sixty-five Party printing presses. This whole many-sided activity, of immeasurable historical importance, was permeated through and through with the spirit of possibilism. In forty-five years history did not offer the German proletariat a single opportunity to remove an obstacle by a stormy attack, or to capture any hostile position in a revolutionary advance. As a result of the mutual relation of social forces, it was forced to avoid obstacles or adapt itself to them. In this, Marxism as a theory was a valuable tool for political guidance, but it could not change the opportunist character of the class movement, which in essence was at that time alike in England, France and Germany. For all the undisputed superiority of the German organization, the tactics of the unions were very much the same in Berlin and London. Their chief achievement was the system of tariff treaties. In the political field the difference was much greater and deeper. While the English proletariat were marching under the banner of Liberalism, the German workers formed an independent party with a Socialist platform. Yet this difference does not go nearly as deep in politics as it does in ideologic forms, and the forms of organization. Through the pressure that English labor exerted on the Liberal Party it achieved certain limited political victories, the extension of suffrage, freedom to unionize, and social legislation. The same was preserved or improved by the German proletariat through its independent party, which it was obliged to form because of the speedy capitulation of German liberalism. And yet this party, while in _principle_ fighting the fight for political power, was compelled in actual practice to adapt itself to the ruling power, to protect the labor movement against the blows of this power, and to achieve a few reforms. In other words: on account of the difference in historical traditions and political conditions, the English proletariat adapted itself to the capitalist state through the medium of the Liberal Party; while the German proletariat was forced to form a party of its own to achieve the very same political ends. And the political struggle of the German proletariat in this entire period had the same opportunist character limited by historical conditions as did that of the English proletariat.