But where is your guarantee, certain wise men ask us, that it is just your party that expresses the interests of historical development? Destroying or driving underground the other parties, you have thereby prevented their political competition with you, and consequently you have deprived yourselves of the possibility of testing your line of action. This idea is dictated by a purely liberal conception of the course of the revolution. In a period in which all antagonisms assume an open character, and the political struggle swiftly passes into a civil war, the ruling party has sufficient material standard by which to test its line of action, without the possible circulation of Menshevik papers. Noske crushes the Communists, but they grow. We have suppressed the Mensheviks and the S.R.s--and they have disappeared. This criterion is sufficient for us. At all events, our problem is not at every given moment statistically to measure the grouping of tendencies; but to render victory for our tendency secure. For that tendency is the tendency of the revolutionary dictatorship; and in the course of the latter, in its internal friction, we must find a sufficient criterion for self-examination. The continuous "independence" of the trade union movement, in the period of the proletarian revolution, is just as much an impossibility as the policy of coalition. The trade unions become the most important economic organs of the proletariat in power. Thereby they fall under the leadership of the Communist Party. Not only questions of principle in the trade union movement, but serious conflicts of organization within it, are decided by the Central Committee of our party. The Kautskians attack the Soviet Government as the dictatorship of a "section" of the working class. "If only," they say, "the dictatorship was carried out by the _whole_ class!" It is not easy to understand what actually they imagine when they say this. The dictatorship of the proletariat, in its very essence, signifies the immediate supremacy of the revolutionary vanguard, which relies upon the heavy masses, and, where necessary, obliges the backward tail to dress by the head. This refers also to the trade unions. After the conquest of power by the proletariat, they acquire a compulsory character. They must include all industrial workers. The party, on the other hand, as before, includes in its ranks only the most class-conscious and devoted; and only in a process of careful selection does it widen its ranks. Hence follows the guiding role of the Communist minority in the trade unions, which answers to the supremacy of the Communist Party in the Soviets, and represents the political expression of the dictatorship of the proletariat.