When the Socialists have become so numerous as to be on the verge of securing control of the government (by whatever means), it is unlikely that the privileged classes will permit peaceful political or constitutional procedures to continue and put them completely at the mercy of the non-privileged. In all probability they will then resort to military violence under pretext of military necessity (see Part III, Chapter VIII). _If when this time arrives, the Socialists have not only a large political majority, but also the physical power to back it up_, or seem about to secure this majority and this power, then indeed, though not before that time, the capitalists may, possibly, begin to make concessions which involve a weakening of their position in society, _i.e._ which necessitate more and more concessions until their power is destroyed. The revolutionary reformers, if we may apply this term to Kautsky and his associates, are then only somewhat premature in their belief that the Socialist Party is _now_, or will _very shortly_ become, a real menace to capitalism; whereas the political reformers are under the permanent illusion that capitalism will retreat before paper ballots. Moreover, Kautsky and the revolutionary reformers, in order to make _their_ (physical) menace effective, must continually teach the people to look forward and prepare to use all the means in their power for their advance. They are thus thoroughly in accord with the non-reformist revolutionists who, however much they may welcome certain capitalist reforms, do not agree that they will be very materially hastened by anything the Socialists can do. The non-reformist revolutionists assume that Socialists will vote for every form of progress, including the most thoroughly capitalistic, and acknowledge that _if they fail in their duty in this respect, these reforms might be materially retarded_. But they are willing to let the capitalists take the lead in such reform work, giving them the whole credit for what benefits it brings, and placing on their shoulders the whole responsibility for its limitations. Their criticism of capitalist reform is leveled not against what it does, but against what it leaves undone.