A loose translation from the preface reads: "The Universidad Obrera de México offers this document that exposes the thinking of the Mexican people to the delegates to the II General Conference of UNESCO, held in Mexico City, D. F., during the months of November and December 1947.
The document was written by Dr. Vicente Lombardo Toledano, Director of the Universidad Obrera de México. It has been illustrated by painters, engravers and draftsmen: Diego Rivera, José Clemente Orozco, David Alfaro Siqueiros, Leopoldo Méndez, Miguel Covarrubias, Alfredo Zalce, Alberto Beltrán, Ignacio Aguierre, Arturo Garcia Bustos, Federico Silva, Francisco Mora and Fernando Castro Pacheco. These artists have contributed to express in a plastic way the thinking of the Mexican people. With the same purpose, an engraving of the unforgettable José Guadalupe Posada has been reproduced.
The engravings on pages 19, 21, 24, 29, 30, 32, 33, 40, 42 and 43 have been kindly provided by the Editorial "La Estampa Mexicana" and appear in its portfolio "85 Stamps of the Mexican Revolution" appeared the month of November of this year.
Mr. Alberto Steiner was in charge of the edition of this book and the artists Gabriel Fernández Ledesma and Enrique Othón Díaz lent their collaboration.
The copyright page reads: "1,500 copies of this book were printed in the workshops of the GALATEA Publishing House, Higinio Arias Urzay, Manuel Gutiérrez Nájera Street, No. 179, México. The engravings were made by Messrs. Martinez and Cruzado."