IN A STUDY of this kind the author's principal debt is to the sources consulted in the preparation of the work. Even heavier documentation than I have employed would be required to indicate the full extent of my obligation for inspiration and information to earlier writers and researchers.
Of the many persons who have aided me in assembling the materials for the book I should like to express my particular gratitude to Mr. J. G. Phelps Stokes, of New York, who gave me access to his fine collection of papers relating to social-justice movements of the Progressive era, and to the officers of the Community Service Society of New York, who allowed me to utilize the historical records of the Society. The librarians of the New York School of Social Work, the New York Public Library, the Library of Congress, and the Newberry Library have been unfailingly cooperative; none, however, have been more consistently helpful than the staff members of the Ohio State University Library.
The investigation was supported in part by funds granted to the Ohio State University by the Research Foundation for aid in fundamental research. I received further and very welcome assistance from University officials during a portion of one academic year in which I was relieved of teaching responsibilities and assigned to research duty.
During the several years the study has been in progress I have often been heartened by the interest taken in it by my wife, Catherine Marting Bremner. I have also benefited from the encouragement and constructive criticism offered by Professors Foster Rhea Dulles, Paul A. Varg, and Harry Coles. Mr. Wilson Follett of the New