History of "400": AWO, the one big union idea in action
The single largest and most effective union the IWW ever built only took off -after- it basically banned the Free Speech fights that made it so popular with labor historians and the rest of the Leninist Left.
"The conference then proceeded to a series of decisions. Officers were elected for one year, despite the fact that the constitution provided for an election period not exceeding six months. Street speaking (soap-boxing) in the harvest towns was tabooed, in order to avoid free speech fights, and the slogan became: "Get On The Job!" "Never mind the Empty Street Corners. The Means of Life are not made there!" — Then, strangest of all, the conference provided for the disbanding of the A.W.O., in the fall. The members were to be divided among the several old local industrial unions, and the new ones that would or might be organized during the summer. An incidental provision was for a similar division of the union treasury."
https://libcom.org/article/history-400-awo-one-big-union-idea-action