He hypothesized that it should be possible to have everyone to work one day less, yet maintain their global production (or national GDP) If the population was split into three approximately equal groups (he called them Red, Blue and White to appeal to the French, British and American readers) and everyone in the same family were to work the same week, then each group is ready to work and rest at overlapping times, but not simultaneously (as at present). Society would have one third of its people working the red week, another third the blue week and the third the white week. Every day throughout the year there would be two groups working their four occupational days of the week and one resting for their two-day weekend.