I disagree, all union power comes down to violence, and it's alive and kicking - literally. For example, we have the Longshore & Warehouse Union in Seattle this past September, where hundreds of union gentlemen stormed the docks with baseball bats, destroyed tons of grain, cut brake lines on railroad cars, and even took hostages. Or how about the systemic violence of the Buffalo Operating Engineers where they like to fill peoples' gas tanks with sand, throw hot coffee in non-union workers's faces, and conduct stabbings. Perhaps union violence isn't as bad as it once was 40 years ago - as you mentioned the Bakers Union here had no reported violence - but union violence is hardly a historical footnote.