Dictatorship of the proletariat
The dictatorship of the proletariat, sometimes abbreviated as DotP, is a guiding principle applied in the transition to communism from capitalism. It facilitates economic development to a level at which communism can be implemented, and prevents counter revolution and sabotage from the international and domestic ruling classes.
As the state exists to assert the rule of one class over another, all class society is a dictatorship; the issue that generally drives the class struggle is who is the ruling class. As such, the DotP is not a dictatorship in the liberal, bourgeois sense of the term but a neutral qualifier as to the owner of state power.
Since there is always an oppressor and oppressed in class society (see also social class) due to the contradictions pertaining to the means of production and, more broadly, to the mode of production, it is important for the proletariat to become the oppressing class over the bourgeoisie if communism is to be achieved.
Use of the term by Marx and Engels
According to the Trotskyist writer Hal Draper, Marx and Engels used the term "dictatorship of the proletariat", or words very close to it, in 11 separate works. (In some of those works it appears more than once.)
- The Class Struggles in France (1850), Part I. Marx writes that after the defeat of the June 1848 workers’ uprising, “there appeared the bold slogan of revolutionary struggle: Overthrow of the bourgeoisie! Dictatorship of the working class!”  According to Hal Draper, this is the first use of the term by Marx or Engels.
- The Class Struggles in France (1850), Part III. Marx speaks of revolutionary socialism and communism as involving the "declaration of the permanence of the revolution, the class dictatorship of the proletariat as a necessary intermediate point on the path towards the abolition of class differences in general....."
- Letter to J. Wedemeyer, 5 March 1852. Marx denies that he had discovered classes or class struggle, but said that "what I did that was new was to prove (1) that the existence of classes is only bound up with particular phases in the development of production; (2) that the class struggle necessarily leads to the dictatorship of the proletariat; (3) that this dictatorship itself only constitutes the transition to the abolition of all classes and to a classless society...."
- Critique of the Gotha Programme. (1875), section 4. Marx says that "Between capitalist and communist society lies a period of revolutionary transformation from one to the other. There is a corresponding period of transition in the political sphere and in this period the state can only take the form of a revolutionary dictatorship of the Proletariat".
- Introduction (1891) to the German edition of The Civil War in France. Engels writes: "Look at the Paris Commune. That was the Dictatorship of the Proletariat".
- The State and Revolution (1918), Chapter 5: "The Economic Basis of the Withering Away of the State". Lenin writes: "the dictatorship of the proletariat imposes a series of restrictions on the freedom of the oppressors, the exploiters, the capitalists. We must suppress them in order to free humanity from wage slavery, their resistance must be crushed by force..."