What was left of the nation of impious men has been extirpated.

extirpate (v) : to pluck up by the stem or root; to root out; to eradicate, literally or figuratively; to destroy wholly; as, to extirpate weeds; to extirpate a tumor; to extirpate a sect; to extirpate error or heresy – source: What If?, p. 113