No ifs, ands or buts about it...

If I ruled the world there would be no death penalty.

Licensed...

If I ruled the world everyone would have to get a license before they were allowed to have children.

Both potential parents would have to pass tests. Individually and as a couple. They would be expensive too (payment plans would be available). Each child would need a separate license and each license has to be paid in full before another will be issued.

Enforcement? I rule the world. I don't deal in details.