We set ourselves the ultimate aim of abolishing the state, i. e., all organized and systematic violence, all use of violence against people in general. We do not expect the advent of a system of society in which the principle of subordination of the minority to the majority will not be observed.
In striving for socialism, however, we are convinced that it will develop into communism and, therefore, that the need for violence against people in general, for the subordination of one man to another, and of one section of the population to another, will vanish altogether since people will become accustomed to observing the elementary conditions of social life without violence and without subordination.

Ch. 4 : Supplementary Explanations by Engels - The State and Revolution (1917)