Back in 1966, the world was in debt to us. We were the high-tech brand you wanted to own. Here’s what I didn’t doubt then: that I would get a job. I didn’t spend much time thinking about my working future, because American affluence and the global dominance that went with it left me unshakably confident that, when I was ready, I would land somewhere effortlessly. So much of daily life would be predicated on, and tied to, the country’s economic power, cheap oil, staggering productivity, and an ability to act imperially on a global stage without seeming (to us Americans at least) like an imperial entity.