The Industrial Workers of the World (IWW), nicknamed "Wobblies," was a revolutionary union founded in 1905. They advocated industrial unionism (all workers in one industry), direct action (strikes, sabotage), and the abolition of capitalism.
Red Scare (1919–20, 1950s), rise of AFL-CIO craft unionism, and internal splits reduced IWW influence. Yet the IWW persists today, active in WA labor and social justice campaigns. Their militant tactics and solidarity culture inspired later movements.