Since the completion of the main body of this study in May, 1952, a highly important contribution to the literature of American socialism has been published by the Princeton University Press. It is entitled Socialism and American Life. Editors of this two volume work are Stow Persons and Donald Drew Egbert . Feature of volume one is a colorful 190-page interpretive study by Daniel Bell entitled "The Background and Development of Marxian Socialism in the United States." Though written entirely independently of each other, Mr. Bell's history and my own are in basic agreement on many points. On the other hand, differences of emphasis also appear, particularly because I have sought to incorporate in my account a study of some of the non-Marxist elements of the general socialist movement. Also, Mr. Bell's essay carries the socialist movement to the present day. My study terminates in 1901.
Volume two of Socialism and American Life is devoted completely to bibliography, and to my knowledge it is the only such work of its kind. Professor T. D. Seymour Bassett, the bibliographer, has done such a thorough and competent job that I feel altogether free to refer readers to his volume for general information of a bibliographical nature.
My intention here, therefore, is not to attempt to do what Professor Bassett has done so capably nor to re-list the sources already mentioned in the footnotes. Rather, I prefer to use this opportunity to comment briefly on the types of material used in the preparation of this study, their general character and relative value, and, if and when necessary, their location. Persons interested in specific bibliographical information, consequently, would do well to refer to the footnotes. I have sought to keep the latter as free as possible not only from secondary works, whose authors frequently copy uncritically one from another, but also from obscure and non-essential sources.
Newspapers and magazines have constituted my principal fount of information. I have consulted, I believe, every important and still available socialist newspaper and magazine of