“It’s easy to make fun of time capsules, but, as Jarvis details, it’s much harder to fill them with the kind of material that will actually stand the test of time. Often, the things we tuck away for posterity are embarrassing or boring. Sometimes, they’re much worse—racist, bigoted, wrongheaded. Most take that old adage about the winners writing history to its logical conclusion. And they are always, by their very nature, exceedingly presumptuous.”