How civilisations end
summary
Claims a 1 in 140 chance of another mass‑extinction asteroid in 100 years, about ~100 biotech incidents in UK high‑containment labs over five years, and multiple technical failure modes: runaway nanotech replicators, collider‑created micro black holes or vacuum decay, nuclear war, runaway greenhouse, and misaligned AI leading to uncontrollable superintelligence. Argues existential risks are one‑shot events, invokes the Great Filter as explanation for the silence of aliens, and calls for awareness, mitigation strategies and global ethics frameworks to manage advancing technologies.
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