A far future tale of civilization returning after it has collapsed. But what if the civilization that collapsed is far, far, in our future when we had spread to a far-flung interstellar empire and that didn't collapse, just Earth civilization did, and the empire lost track of the home world. Can Earth survive being re-colonized by the flourishing interstellar empire, just as they begin to realize that what is over the next ridge isn't the farthest place to explore? ( )