What struck me about the example in this post that its basically genetically equivalent to reliable easy to use contraception.
And now that I think about it humanity basically is like a giant petri dish where someone dumped some antibiotics. The demographic transition is a temporary affair, a die off of maladapted genotypes and memeplexes.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
If continuing the discussion becomes impractical, that means you win at open threads; a celebratory top-level post on the topic is traditional.