Working more hours than 70s, less than 1900s (Score 2)

Since most people feel that they work harder now than corresponding people in the past, it is not surprising that Gleick should bring up the statistic that the average work week is longer now than it was in the 1970s. But a more interesting statistic to me is that our average work week now is actually shorter (by 8-10 hours) than what it was in the 1900s. Sadly, I don't remember the reference on this, but it was something reputable.