The concept of a short workweek is not a new one. In the 1900s, unions advocated reducing the number of working days from six to five, which birthed the idea of “weekends.” The turn of the 20th century saw weekly work hours reduced from 60 to 40 per week. Economists in the last century, including John Maynard Keynes, predict that weekly work hours will compress even more and that a 15-hour workweek could happen in a few generations.