Earlier quoted context omitted.
> For one thing, it's highly convenient that the standard US work-week happens to be the exact "correct" amount of hours to work to maximize productivity. It's not in the slightest bit down to convenience. It's because 40 hours was quite simply discovered to be a more productive length of day, well over a century ago, back in the later stages of the industrial revolution. In the US, if memory serves, the move to a 40…
Ah, Henry Ford experimented? That's just good science. Hehe. Seriously though -- I'd like to read more about that. Do you have a source?
Relevant in case you think "Henry Ford thought of the idea, therefore it is correct."