Yeah, absolutely no existential dread from the Cold War. And we all just instantly stopped believing that the world would end in a nuclear holocaust just because the Soviet Union collapsed. Then there was the Gulf war, then 9/11, then another Gulf war. And we've known about climate change and how capitalism is killing our planet for practically the entire time, that's not new. Oil crisis? That's been a slowly building crescendo of apocalypse since like the 70s.

I'll buy existential dread as an excuse for not wanting to breed, not as an explanation for teenagers being less horny.

Should be the opposite. Stressful conditions make us want to fuck and make babies. Maybe I'm wrong, but in any case, sex is about the most effective stress relief I know of.