“…sometimes medicine’s interventions are unwelcome or go overboard, and nature’s way of doing things can serve as a useful corrective”

In the case of “natural immunity,” the modifier implies the absence of human intervention, allowing for a process to unfold as it would if we did nothing, as in “letting nature take its course.” In fact, most of medicine sets itself against nature’s course, which is precisely what we like about it — at least when it’s saving us from dying, an eventuality that is perhaps more natural than it is desirable.

Yet sometimes medicine’s interventions are unwelcome or go overboard, and nature’s way of doing things can serve as a useful corrective. This seems to be especially true at the beginning and end of life, where we’ve seen a backlash against humanity’s technological ingenuity that has given us both “natural childbirth” and, more recently, “natural death.”

Michael Pollan, “Altered States”, The New York Times Magazine (3 May 2015), 16.