Una Gran Union de los Trabajadores Industriales del Mundo [Title Page]. Una Sola y Grande Union de Todos los Trabajadores [Front Cover]

Chicago, Illinois: Industrial Workers of the World (2422 Halsted St. Norte), 8211. Printed in Morelia, Mexico. Pamphlet. Very Good +. 23 pp. [+4 pp. insert bound at the center between pages 10 and 11.] Octavo [23 cm]; side-stapled in printed wrappers. Just a bit of toning to some of the internal pages. This copy is clean and in excellent shape, with just a soft, faint central vertical crease that runs throughout. Spanish language edition; a translation or variation of the IWW informational and organizing pamphlet "One Big Union of All the Workers..." or "One Big Union of The IWW..." etc (reference: Miles 4393–4397).

The single-sheet [4 pp.] insert prints the Errata for this work on one side, and an illustration of "Father Thomas J. Hagerty's Wheel" which is a circular diagram of the structure of the IWW's industrial union system.

"Father" Thomas J. Hagerty (b. 1862) was a Catholic priest, a co-founder of the IWW, the author of the IWW's omnipresent "Preamble" text, and the creator of this chart, "Hagerty's Wheel" (see: https://archive.iww.org/history/biography/FatherHaggerty/ and https://archive.iww.org/about/official/wheel/). Shortly after the establishment of the IWW in 1905, Hagerty left both the Catholic church and the radical political movement. Late in life, before his death sometime in the 1920s, Hagerty was reported by some of his former union comrades to be living in voluntary poverty on the streets of Chicago.