Practitioners of natural method birth control are commonly called parents.
This planet does have limits: I do not see the Lord multiplying loaves and fishes anytime soon (especially the fishes: they are going to crash).
Children as a resource? Perhaps. But to depend on them for my wellbeing? Ha.
Ones own children cannot always be depended on to support the elderly parents.
I repeat, to dogmatically proclaim 'everyone must procreate' is just as reprehensible to say 'everyone must not procreate.'
I still pay school taxes to educate (or not) other peoples children. I pay other taxes to support ever burgeoning welfare queens. I pay social security (which I will never see). An economy that relies on an ever-expanding population is asking for trouble. I suggest you look up Malthus. He was not wrong, merely delayed by the industrial revolution and America.
Finally, maybe we can mass produce food from synthesized food stuff from maggots. (after all, the little buggers will grow in just about anything. Why should we have to put up with mediocrity in everything so we can crowbar ourselves into shrinking space? Cover everything with apartment houses, cover every square inch. Children are our resources.. for what..
On the Television Program 20/20, John Stossel said that the entire human population of earth could fit into Texas at the density of Tokyo.
Theres lots of room, lots of resources. Dont Panic!