It's clear that, on so many levels, the gradual deferral of child-bearing to the 30s (even 40s!) has been incredibly costly and destructive to society.

We need to figure out a way to reconcile having children starting in the late teens and ending in the mid-20s (which is by far the safest, cheapest, and easiest time to do it) with the modern economy (which prioritizes slavishly focusing on school/work until your fertility has mostly dried up and you're at massively increased risk of passing on genetic abnormalities).

One strategy could be to have child-rearing skip a generation, with grandparents (in their 30s/40s) doing most of the work while the parents (in their teens/20s) go to school and start their career.