“Socialism means the abolition of classes. The dictatorship of the proletariat has done all it could to abolish classes. But classes cannot be abolished at one stroke.
And classes still remain and will remain in the era of the dictatorship of the proletariat. The dictatorship will become unnecessary when classes disappear. Without the dictatorship of the proletariat they will not disappear.
Classes have remained, but in the era of the dictatorship of the proletariat every class has undergone a change, and the relations between the classes have also changed. The class struggle does not disappear under the dictatorship of the proletariat; it merely assumes different forms.”
— Lenin, “Economics And Politics In The Era Of The Dictatorship Of The Proletariat,” Pravda, 1919.