Juli Gittinger keeps a bag packed with iodine pills and a machete. “It’s good for getting through brush,” she explained to me recently. Gittinger’s mind churns with images of a future in which she ...

After a recent playdate, a dad friend of mine told me that he and his family would be able to survive off-grid during a national crisis. He’s well prepared for it, in fact. He stockpiles food in barns ...