In the 1940s, Colón was president of the Cervantes Fraternal Society, the Spanish language division of the pro-Communist International Workers Order (IWO), a non-profit fraternal organization (life & health insurance, social and cultural activities, etc.) made up of 16 ethnic/language groupings that, in total at its height, counted almost 200,000 members. (The Cervantes Fraternal Society, IWO, should not be confused with the Cervantes Society of America, an academic group.) The IWO, after being included on the U. S. Attorney General's list of "subversive organizations" (the listing was overturned by the U.S. Supreme Court), was dissolved by the NY State Supreme Court in 1951.