Formed in 1905, the Industrial Workers of the World (IWW) — or the Wobblies, as they were also known — may have been the most radical and egalitarian mass union in U.S. history. From the mills of New England to the wheat fields of Kansas, from the docks of Philadelphia to the forests of the Pacific Northwest, the IWW organized workers, often the so-called unskilled laborers that craft unions…