"Industrial Unionism, the organization of the proletariat in accordance with the integration of industry and for the overthrow of Capitalism, is a necessary phase of revolutionary Socialist agitation. Potentially, industrial unionism constructs the basis and develops the ideology of the industrial state of Socialism; but industrial unionism alone cannot perform the revolutionary act of seizure of the power of the state, since under the conditions of Capitalism it is impossible to organize the whole working class, or an overwhelming majority into industrial unionism. "It is the task of a revolutionary Socialist party to direct the struggles of the proletariat and provide a program for the culminating crisis." Julius Hammer, in a letter published in "The Call," April 4, 1919, speaking of the Left Wing, says: "Aside from the discussions as to the principles and tactics identifying the 'Left Wing' there is a great deal of acrimonious discussion and opposition to those in the 'Left Wing' organization. They are called 'separatists,' 'secessionists,' 'splitters of the party,' and this in spite of vehement denials that there is intention or desire to split the party. 'It is unnecessary,' say they, 'and superfluous; the party machinery is ample for the purpose now; organization within organization is injurious and wrong.' Some seem to go even further and fling epithets of 'disrupters,' 'traitors,' 'direct actionists,' 'anti-politicalists,' 'anarchists,' etc. And there seems to be quite a number who consider that the menace should be met with stern measures--nothing less than expulsion." In the Left Wing statements of principles and tactics the reader will observe a constant emphasis upon "direct action," or violence, and in favor of "industrial unionism" and the "identification of the Socialist Party with class conscious industrial unionism." Chapters VIII and IX of this work, which describe the principles and tactics of the I. W. W., will make the significance of the Left Wing movement perfectly apparent as an effort to combine Socialist Partyism and I. W. W.'ism or to place the latter under the political leadership of the former. In the Left Wing we see an enthusiastic consecration of the major part of the American Socialist Party to revolutionary violence--the direct application of anarchistic tactics to the overthrow of the Government and institutions of the United States. As we follow the Left Wing movement we shall see the principles and tactics of the I. W. W., as carried out in Russia, adopted as a program by the major part of the American Socialist party, which also finally succeeded in committing the minor part, the Right Wing, to the same principles.