Mid Future (2050-2100)

Five novels cluster in the 2050-2100 band, and they share an odd structural feature: each one smuggles a theological question into a scientific chassis. Blish's *A Case of Conscience* does it explicitly — a Jesuit biologist on an alien world — but Stephenson's *The Diamond Age* asks the same thing about moral formation through its Primer, Asimov's *The Gods Themselves* frames energy exchange between universes as a problem of sacrificial ethics, Wilson's *Spin* wraps eschatology in astrophysics, and Di Filippo's *Ribofunk* treats bioengineering as a new Genesis. David Brin, writing his afterword to *Earth*, nails why: fifty years out is the exact distance where you can't rely on either the familiar or the fantastic, so you're forced to say what you actually believe about human nature. The futurologists of the 1960s — Kahn, Bell, Toffler — tried to make this zone a science, but the novelists who set stories there keep discovering it's a confessional. The mid-future isn't a prediction horizon. It's a moral mirror with a fifty-year delay.