Before I now proceed with my theme, "Socialism and the Social Movement in the Nineteenth Century,"--that is, to one member of this antithesis, the social,--I would first suggest the question: "What is a _social movement_?" I answer: _By a social movement we understand the aggregate of all those endeavours of a social class which are directed to a rational overturning of an existing social order to suit the interests of this class._ The essential elements in every social movement are these: First, an existing order in which a certain society lives, and particularly a social order which rests chiefly upon the manner of production and distribution of material goods as the necessary basis of human existence. This specific system of production and distribution is the point of issue for every social movement. Secondly, a social class which is discontented with the existing conditions. By a "social class" I understand a number of similarly interested persons, especially persons who are similarly interested in economic matters--the distinctive point; that is, of men who are interested in a specific system of production and distribution. We must, in understanding any social class, go back to this economic system; and we should not allow ourselves to be blinded or confused by the inbred notions of certain classes. These prepossessions, which frequently control, are only bulwarks of classes differing economically. And, thirdly, an aim which this class, discontented with the existing order of things, holds up to reach; an ideal, which presents compactly all that for which the society will agitate, and which finds its expression in the postulates, demands, programmes of this class. In general, where you can speak of a social movement you find a point of issue, the existing social order; a supporter of the movement, the social class; an aim, the ideal of the new society. In what follows I shall attempt to give some points of view for an understanding of a specific--the modern--social movement. But what do we mean by the phrase "to _understand_ a social movement"? This: to comprehend the social movement in its essential historic limitations, in its causal connection with historic facts out of which, of necessity, that is produced which we describe as a social movement. That is, to comprehend why specific social classes are formed, why they present these particular points of opposition, why especially a pushing, aggressive social class has, and must have, that particular ideal for which it reaches. We mean, above all, to see that the movement springs not out of the whim, the choice, the malevolence of individuals; that it is not made, but becomes.