It was in the ancient days of the early 70s that I saw and read this book. It was large, thin, and in thick cardboard pages. It was trying to tell us kids how much better the future would be and invoked a word: productivity. It claimed that productivity was growing rapidly, and that we would soon have twice the productivity of a generation before. What that meant was that we could do the same things in half the time, which meant that everybody would be able to work, say, only 20 hours a week and we’d get the same output.