“It’s very difficult, in fact nearly impossible, to escape the human world entirely and live in another. A very few people can do a Thoreau or a Ted Kaczynski – but even they still live in a fairly human world, only a few miles from town, able to walk or bike to the grocery store and to have their laundry done. There are a few hunters and trappers, prospectors and miners; a few lighthouse keepers, fire watchers, anchorites, disappearers. But even they usually rely on human artifacts, and in any case they don’t always last long. Chris McCandless set off to try it in Alaska and starved to death in a matter of weeks, a few miles from a highway. And the vast majority of us can’t even do that much, or anything like it – not with six billion people on the planet…”