By Mat Rogers The 1979 children’s book Ox-Cart Man describes a colonial family who spends all year raising a crop and an ox, building the ox’s cart, and making mittens, brooms, and candles. Then the ox-cart man sets off to market to sell the crop and the mittens, brooms, and candles, then the ox, then the cart. He returns home carrying the supplies from the market the family will need for the next year and everyone starts over again. Maybe...