Leon Trotsky
Marx and Engels hammered out the idea of the dictatorship of the proletariat, which Engels stubbornly defended in 1891, shortly before his death – the idea that the political autocracy of the proletariat is the “sole form in which it can realize its control of the state.”
That is what Kautsky wrote about ten years ago. The sole form of power for the proletariat he considered to be not a Socialist majority in a democratic parliament, but the political autocracy of the proletariat, its dictatorship. And it is quite clear that, if our problem is the abolition of private property in the means of production, the only road to its solution lies through the concentration of State power in its entirety in the hands of the proletariat, and the setting up for the transitional period of an exceptional regime – a regime in which the ruling class is guided, not by general principles calculated for a prolonged period, but by considerations of revolutionary policy.
The dictatorship is necessary because it is a case, not of partial changes, but of the very existence of the bourgeoisie. No agreement is possible on this ground. Only force can be the deciding factor. The dictatorship of the proletariat does not exclude, of course, either separate agreements, or considerable concessions, especially in connection with the lower middle class and the peasantry. But the proletariat can only conclude these agreements after having gained possession of the apparatus of power, and having guaranteed to itself the possibility of independently deciding on which points to yield and on which to stand firm, in the interests of the general Socialist task.