This assumes population contraction is more bad than good which isn’t definitely true. I can imagine several positive effects:
Concentration of accumulated family wealth in a few decendants making people wealthier in general, with several benefits:
people better educated, more able to innovate
less reason for conflict over resources
people have the space to think beyond their own survival and more about things like “should I be keeping this chicken in such a small cage” or “should I be doing something about malaria deaths”
Parents divide their ability to provide care and opportunities between fewer children, resulting in more well-adjusted, better educated kids
This assumes population contraction is more bad than good which isn’t definitely true. I can imagine several positive effects:
Concentration of accumulated family wealth in a few decendants making people wealthier in general, with several benefits:
people better educated, more able to innovate
less reason for conflict over resources
people have the space to think beyond their own survival and more about things like “should I be keeping this chicken in such a small cage” or “should I be doing something about malaria deaths”
Parents divide their ability to provide care and opportunities between fewer children, resulting in more well-adjusted, better educated kids
Reduced environmental impact