I really struggle with this. Apart from "evil" countries like China we do very little to try to steer the reproductive outcome / health of our own species. We aggressively breed domesticated animals and plants but apart from class stratification we do almost nothing to ensure a positive genetic future for ourselves.
Why not? I'm not suggesting we prevent certain people from having kids (who? who decides?) but awareness of really basic concepts like "kids are expensive, have fewer or none if you're poor" simply aren't out there or are ineffective.
My wife and I (I'm an entrepreneur and a software engineer, my wife is GM of a company in architectural design) very deliberately decided to have one child. Our nanny on the other hand has three (grown) children. They're all in the same income bracket as she is and all having children of their own.
It's pretty well known that smarter / better educated people have fewer kids. That means that our current 7 billion is mostly those least equipped to raise the next generation and also those most likely to increase its size.
Again, I'm not suggesting we have the government try to regulate reproductive rights. (Governments rapidly accumulating power via technology is another problem we have to deal with as a species.) But what about global awareness? Or what about incentivizing the poorest people to have fewer children via social programs, education, etc.
And, just in case: No, you can't compare what I'm suggesting to Nazi Germany. This has nothing to do with race. I don't think race is even a meaningful concept when discussing humans. This is about us taking responsibly for our future and the health of the only planet we'll be able to call home for the foreseeable future -- by raising awareness of our collective responsibility to future generations, our strengths and weaknesses as custodians of.
[Edit]
Was really hoping to spark a meaningful discussion here. I think this is the elephant in the room wrt our future as a species -- as important as curbing CO2 emissions or detecting / destroying the next killer asteroid.
1. Just for the record, no, I did not call China evil. I thought that was self evident. I guess not. If I thought Chinese people were evil my son wouldn't be half Chinese.
2. Yes, there are a number of reasons poor people have more children than they should. None of those negate what I am saying. I'm suggesting we need to educate the poor on choices that will benefit themselves, their children and the human race as a whole.