What are you on about? How does social security reduce population? Citation very needed. I think you mean to say first world countries empirically grow slower.

What are you on about? How does social security reduce population? Citation very needed. I think you mean to say first world countries empirically grow slower. And why does population control need to be brutal? You don't need to kill living people, just don't birth unborn people. Have tax paid contraceptives, tax paid abortion for those that mess up, and tax/fine/jail people that have 3+ babies (having 2 babies per couple is sustainable). Maybe also have a baby making approval process. My home remodel needs to be approved, but I can make a new person without any approval whatsoever? That does't make sense. If you ignore the law, you go to jail. Your child will be adopted or raised in a foster home. Not killed.