Steve is correct...
"Stopping breeding won't make the world great. It'll eventually make the world full of nothing but old people."

...but controlled breeding 'might' head off the mass starvation and riots as the have-nots decide not to tolerate the 'haves'.

Best estimates I have heard is that Earth might manage indefinitely with a population of 2-2½ billion... (as it was about 1951)...

No one took my bait above about 45 trillion... when I use it in a discussion, someone usually says.."Oh, don't be silly... we wont have 45 trillion."

And I say.."Oh.. maybe 600 Billion?" And they say, "Nonsense... not that much."... and I say, "Oh? Then when will it stop? We have over 7 billion now... do you want your kids to deal with 10-15-20 billion?"

It's like putting a frog in cool water and raising the temp s-l-o-w-l-y... by the time he sees the problem, it's too late.

Some sort of **controlled** breeding is necessary, but probably close to impossible to implement due to suspicion of the motives of the controllers and just plain ignorance.

I see the implications of my pessimism...I just don't know how to get out of it. (well... I do, but no government would dare to consider my suggestions.)