A bit surprised not to see a reference to Henry Ford. I thought he was the father of the 40 hour work week? He did include in his thinking the idea that more leisure time would allow workers more time to enjoy his cars, but IIRC the basis of the change was not social, but productivity, and based on his own studies.
The 40-hour workweek was conceived of and fought for by many socialists and labor activists over many years. What can be said for Ford is that they instituted it without being forced to (by strike or law), but it was nearly 50 years after it had been instituted for federal employees (and 2 years after it was a part of FDR's platform.)
I wonder which had the biggest effect on its widespread adoption, Ford on the unions. I'm sure I read that once Ford did it, it became almost fasionable in the factory owning classes!
