I’d just note, on the AW front, that the movie (a bit less the book) Children of Men is about exactly what happens to society without children.

I mean, you can disagree with it (I do), but the point in the movie is really, really fucking clear. Like, unsubtle as a sledgehammer to the toe level of clear.

And, of course, Beyond Thunderdome, that classic of AW movies, is all about what a dude will do to save a bunch of kids. Just so happens that the kids kinda kick ass themselves.