Well what would that license be based on? It would be based on competence and resources
1. so poor people can't have children? What if you become poor after you already have them?
2. no person is a competent parent before being a parent.
Also, how to define "competence"? Is a jehova witness who'll teach his/her child that science is not to be trusted, the world is 6000 years old and evolution is a satanic conspiracy "competent"? Is a mulsim who teaches his kid a "false religion" (according to the culture he happens to find himself in) "competent"?
What about a wealthy person who, to acquire that wealth, will typically work 12 hours per day and have his / her children basically raised by a nanny. Is that person "competent"? Or is it in that case the nanny that needs to be "licensed"? And if that's the case, could any "incompetent" person then not have children using a "licensed nanny"?
And off course, the window to abuse and corruption is just so insanely huge that it's not even funny. And if nothing else, to get a "license" you'll also always be at the mercy of the one doing the "evaluation". Some will be stricter then others.
It's just an utterly insane idea in my book. One that could never work in practice.
Yeah, sometimes, when you see what some parents do (in my experience: the vast, vast minority), it might be said "some people should not have a license for having kids!" - but that's just something that is said. It could never work in the real world. The result would be absolutely disastrous imo.
I used to post that I was pro-license in this matter, but I don't know. I'd rather people follow good general rules on their own about this kind of thing.. which I don't really think they do, but whatever.
If there had to be a license, it would be based on competence, and a resource to person ratio. After a couple has two kids, birth control use would come into the picture. The occasional 3rd kid, resulting from failed birth control, might keep the world population neutral
People on average today already have far, far, FAR less children then just 100 years ago.
Typically all people of my age had grandparents with siblings ranging from 5 to as much as 20.
Infant mortality was huge back then. My wife's grandfather had 18 siblings. 7 of them died in the same night from some disease causing diarrhea which today is dealt with swiftly with some simple medicine...
And today, people also tend to live a lot longer.
In my social circle, there are 2 couples who have 3 children. All others is just 2 or less.
There is off course something to say about population growth control, but it comes with serious downsides.
All those old people that aren't productive anymore... they need to be fed and cared for. You thus need young people to earn that money.
So it's not as easy as it sounds to just "restrict" the amount of children people have.
Less births = smaller working population 20 years later = less economic activity = less resource generation.
But still a LOT of old people to take care off, who themselves no longer contribute to economic production.
This would result in people having to work till the age of 70 or even longer as a result.