There’s no shortage of things that could end the world. But between climate change, risks from AI, and biological threats like pandemics, we seem to be forgetting about one human-made existential risk that has been with us for 80 years: the ever-present possibility of nuclear warfare. But nuclear war hasn’t forgotten about us. “Because of extraordinary luck over 80 years, despite many close calls and near-misses, there hasn’t been a detonation of nuclear weapons,” Elise Rowan, the deputy vice president of communications at the Nuclear Threat Initiative (NTI), told me over email. “Ev...

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