Let me add that I have not considered it my function to act as censor to the process of social evolution. Every aspect of the revolutionary movement has found a voice in this book. Two questions have been asked of each writer: Have you had something vital to say? and Have you said it with some special effectiveness? The reader will find, for example, one or two of the hymns of the "Christian Socialists"; he will also find one of the parodies on Christian hymns which are sung by the Industrial Workers of the World in their "jungles" in the Far West. The Anarchists and the apostles of insurrection are also represented; and if some of the things seem to the reader the mere unchaining of furies, I would say, let him not blame the faithful anthologist, let him not blame even the writer--let him blame himself, who has acquiesced in the existence of conditions which have driven his fellow-men to the extremes of madness and despair. In the preparation of this work I have placed myself under obligation to so many people that it would take much space to make complete acknowledgments. I must thank those friends who went through the bulky manuscript, and gave me the benefit of their detailed criticism: George Sterling, Max Eastman, Floyd Dell, Clement Wood, Louis Untermeyer, and my wife. I am under obligation to a number of people, some of them strangers, who went to the trouble of sending me scrap-books which represented years and even decades of collecting: Elizabeth Balch, Elizabeth Magie Phillips, Frank B. Norman, Frank Stuhlman, J. M. Maddox, Edward J. O'Brien, and Clement Wood. Among those who helped me with valuable suggestions were: Edwin Björkman, Reginald Wright Kauffman, Thomas Seltzer, Jack London, Rose Pastor Stokes, May Beals, Elizabeth Freeman, Arthur W. Calhoun, Frank Shay, Alexander Berkman, Joseph F. Gould, Louis Untermeyer, Harold Monro, Morris Hillquit, Peter Kropotkin, Dr. James P. Warbasse, and the Baroness von Blomberg. The fullness of the section devoted to ancient writings is in part due to the advice of a number of scholars: Dr. Paul Carus, Professor Crawford H. Toy, Professor William Cranston Lawton, Professor Charles Burton Gulick, Professor Thomas D. Goodell, Professor Walton Brooks McDaniels, Rev. John Haynes Holmes, Professor George F. Moore, Prof. Walter Rauschenbusch, and Professor Charles R. Lanman.