Jose Vasconcelos (1882-1959), a major figure of modern Mexican education, also was instrumental in the development of the field of librarianship in Mexico. This research paper presents Vasconcelos' philosophy of librarianship through a detailed study of his writings and a review of major secondary sources. Relying solely on the subjective interpretation of historical documents, the study examines Vasconcelos' autobiographical, philosophical, sociological, and educational works for their relevance to his overall philosophy of librarianship. A brief historical background is provided to place the study in the context of the political upheavals that occurred in Mexico at the time of Vasconcelos' writing. Following an introduction, the paper describes the primary and secondary sources consulted and includes sections on: The Man; The Philosopher; The Sociologist; The Educator; and The Librarian. Bibliographies of sources consulted and cited are included. (THC)