And first of all that it was no one thing. That it was multicausal, with no particular beginning and no end. More a climate than an event, so not the way apocalypse stories liked to have a big event, after which everybody ran around with guns, looking like Burton and his posse, or else were eaten alive by something caused by the big event. Not like that.

It was androgenic, he said, and she knew from Ciencia Loca and National Geographic that that meant because of people. Not that they’d known what they were doing, had meant to make problems, but they’d caused it anyway. And in fact the actual climate, the weather, caused by there being too much carbon, had been the driver for a lot of other things. How that got worse and never better, and was just expected to, ongoing. Because people in the past, clueless as to how that worked, had fucked it all up, then not been able to get it together to do anything about it, even after they knew, and now it was too late.

So now, in her day, he said, they were headed into androgenic, systemic, multiplex, seriously bad shit, like she sort of already knew, figured everybody did, except for people who still said it wasn’t happening, and those people were mostly expecting the Second Coming anyway. She’d looked across the silver lawn, that Leon had cut with the push-mower whose cast-iron frame was held together with actual baling wire, to where moon shadows lay, past stunted boxwoods and the stump of a concrete birdbath they’d pretended was a dragon’s castle, while Wilf told her it killed 80 percent of every last person alive, over about forty years.

…

No comets crashing, nothing you could really call a nuclear war. Just everything else, tangled in the changing climate: droughts, water shortages, crop failures, honeybees gone like they almost were now, collapse of other keystone species, every last alpha predator gone, antibiotics doing even less than they already did, diseases that were never quite the one big pandemic but big enough to be historic events in themselves. And all of it around people: how people were, how many of them there were, how they’d changed things just by being there.

— Excerpt from The Peripheral by William Gibson