Poland has 0 (zero) tax up to 50k$ per household for families with 4 kids. And there many other benefits afaik. And it is a highly religious country. It's ferti

Poland has 0 (zero) tax up to 50k$ per household for families with 4 kids. And there many other benefits afaik. And it is a highly religious country. It's fertility rate is 1.4-1.5. Industrialized and highly educated populations will not go back to 2.1 and higher, it just doesn't work like that in the current social environment.