It is the charge of every Earth-liver to consume. Food, plastics, and oxygen are ripe for the literal and non-literal digestion. Shoes, however, are a different sort of beast. Neither plastic nor oxygen, they sit and wait in a bin of blank description. The greatest scientist in the time of our great-great-grandchildren may finally discover an adequate category for the shoe, but we will not be alive to see it. But you may fall asleep, knowing that our future is safe.