I assert: that no movement can be durable without a stable organization of leaders to maintain continuity; that the more widely the masses are spontaneously drawn into the struggle and form the basis of the movement and participate in it, the more necessary is it to have such an organization, and the more stable must it be (for it is much easier for demagogues to side track the more backward sections of the masses); that the organization must consist chiefly of persons engaged in revolutionary activities as a profession; that in a country with an autocratic government, the more we restrict the membership of this organization to persons who are engaged in revolutionary activities as a profession and who have been professionally trained in the art of combating the political police, the more difficult will it be to catch the organization, and the wider will be the circle of men and women of the working class or of other classes of society able to join the movement and perform active work in it.