In addition, no one today remembered why the war had come about or who, if anyone, had won. The dust which had contaminated most of the planet's surface had originated in no country and no one, even the wartime enemy, had planned on it. First, strangely, the owls had died. At the time it had seemed almost funny, the fat, fluffy white birds lying here and there, in yards and on streets; coming out no earlier than twil…
I think about this aspect of the book all the time when I see kids (and increasingly adults) invested in games like Pokémon during our ongoing mass extinctions. The book doesn’t cover the intermediary steps between its barren world and our own, but it’s a pretty easy to draw a through line between the digital ecosystems we’ve built in the past 40 or so years and the synthetic life of Blade Runner.
Ecology is a huge theme through the whole thing. It is not a happy-go-lucky franchise isolated from the troubles of the world.