Nevertheless, there has been a close connection between sociology and socialism historically. It has been largely the agitations of the socialists and other radical social reformers which have called attention to the need of a scientific understanding of human society. The socialists and other radical reformers, in other words, have very largely set the problem which sociology attempts to solve. Practically, moreover, the indictments and charges of the socialists and anarchists against the present social order have made necessary some study of that order to see whether these charges were well founded or not. In this sense sociology may be said to be a scientific answer to socialism, not in the sense that sociology is devoted to refuting socialism, but in the sense that sociology has been devoted very largely to inquiring into many of the theoretical assumptions which revolutionary socialism makes. The further relations of sociology to socialism will be taken up later. Here we are only concerned to have the reader see that there is a sharp distinction between the sociological movement on the one hand, that is, the movement to obtain fuller and more accurate knowledge concerning human social life, and the socialist movement, the movement to revolutionize the present social and economic order. Moreover, it may be remarked that while socialism seems to be mainly an economic program, it involves such total and radical reconstruction of social organization that in the long run the claims of socialism to a scientific validity must be passed upon by sociology rather than by economics.