The eight-hour workday has been a standard for centuries. Have you ever wondered why?
Microsoft Productivity Survey - http://news.microsoft.com/2005/03/15/survey-finds-workers-average-only-three-productive-days-per-week/
Working Long Hours Doubles Odds of Depression - http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0030719
“Compelling evidence of the need for corporate work/life balance initiatives: results from a national survey of stressful life-events” - http://onlinelibrary.wiley.com/doi/10.1002/j.2161-1920.2001.tb00491.x/abstract
The Robert Owen Museum - http://robert-owen-museum.org.uk/
“Get a Life,” from the Economist - http://www.economist.com/blogs/freeexchange/2013/09/working-hours