Having children younger. This builds villages and generates the community flywheel. The problem now is that it's close to impossible for the vast majority of younger people to buy a home with a single income. So the choice becomes dual income and farm out the raising of your children (requires even more money and negates the benefits of enjoying your children which is part of the reason to have them in the first place), or delay having children until you are financially secure. Couple this with the constant inundation of social media and the myriad experiences available with the click of a button and people are simply taking the short term gratification route.

Society needs to change and we need to incentivize it.