It is very true and a very difficult question. I have a good friend who is a catholic priest. He is an intelligent well educated man but, because of his belief (or indoctrination) he swears blind that no matter how many people are produced, the world can support them because god said it will be so. To the rational mind this is obviously rubbish but it gives those who choose to believe it a convenient little happy place to go to when they don?t want to face up to the really difficult questions. Anyway, basically it leaves the rest of us asking, would we rather die out as a species or live in a world where everything is so controlled that even every one of our sperm have to be accounted for? Hopefully neither will happen and there will just be a population peak followed by a crash with a new, hopefully better, society emerging from the other side. Or maybe we?re all fucked.