In his magisterial, improbably thrilling 1989 book The Pencil, Henry Petroski, a longtime professor of engineering and historian at Duke University, recounted that Henry David Thoreau, upon making a list of essential items to bring on an expedition into the woods, neglected to mention a crucial item, something that he was actually never without: a pencil. “Perhaps the very object with which he may have been drafting his list was too close to him,” Petroski suggests, “too familiar a part of his own everyday outfit, too integral a part of his livelihood, too common a thing for him to think to mention.”
We overlook the things that are within reach, until they are not. That this would happen with small, common, or easily replaced objects is understandable, even rational. And yet we also tend to overlook those things that are large, expensive, and central to our everyday lives. I am talking here about infrastructure. […]