[omnimus]

It's strange to put it like “we invented 40hour workweek”. It was extremely hard fight won by cooperation of many levels of the working class. The business owners absolutely didn't want it.

This would have to happen again. But there is none of that worker unity so it's unlikely to happen. The productivity gains will go solely to the bussiness owners.

[Eridrus]

While unions did fight for the 40 hour work week and crystalized that specific number, their actual causal impact (on hours worked, not law) is contested since hours were already falling well before unions were organizing for the 40 hour work week.