Five Quick points
Speaking as someone who was raised on the apocalyptic cinematic visions of the 1960s and 1970s ("Soylent Green" being one of the most interesting), I have a considerably less optimistic view of the world and of people. So here are a few things to consider.
One, we can barely house and feed the population we already have. Already our fuel supplies are running out and our next likely fuel source (ethanol) is endangered because most of the land that could be used for growing corn is being torn up to build these cul-de-sac neighborhoods for all these young couples and families who cart their three children to the mall in an exorbitantly consuming SUV and three-child capacity strollers looking around for the ultimate kiddie clothes bargain sale while buying an endless array of Pokeman videos. Like the sticker says, "if ya can't feed 'em, don't breed 'em." America needs to learn that lesson. If august spies reads this, I'm sure he'll have something to say.
Two, realize that while there IS a biological reason for wanting children (women will vouch for it), understand that most of the reasons you want to start a family is because of cultural influence and social pressure. A lot of societies are designed around tradition SO thoroughly that we actually manage our lives as though we are machines. Notice that your parents tell you all throughout adolescence to avoid sex and never have children; but as soon as you pass that 26-year mark, they can't stop begging you to start pumping them out, as though your life was on a planner. And your friends get on you about it too. So think first: are you doing it for YOU, or are you doing it for THEM? Do you want your family to try running your life forever?
Three: religion. Religion is a dubious excuse for it. There are a lot of Catholics out there and all the morality and procedure about sex can weigh heavily on the mind. First of all, according to the dogma, your sex life is designed to produce children, NOT for your own enjoyment; if you do enjoy it, fine, but if nothing comes from it, you're in trouble. Also the church (of any kind) tells you to avoid contraception, birth control and abortion, all of which are preventative measures against having children. Notice that in their rhetoric the church thinks your sex drive can be switched on and off like a light switch, but your ability to have children should NEVER be touched. Are you a person, or a brood mare for the state?
Four, really think about your abilities as a parent. Children are our future because they will be able to live beyond us and fix what we won't live long enough to. Essentially, parenting is sacrifice, mostly giving up YOUR life for someone else. Noble, but that sacrifice can cause bitterness and resentment, and if you think you WON'T take that out on your kids, think again. This is part of the reason I think you should have a license to have children. Because as we've seen in the Middle East, children can also be used to keep a war going.
Five. Your child is NOT YOU. You may have idealized perceptions about life with a family will be like, and there's a lot of narcissism in that. Your child will have it's own personality, it's own wants and desires; some of them will be SIMILAR to you, but your child is not a small version of yourself. You will have to get used to that and the differences involved. If you are a concert pianist and your child is tone deaf, LEAVE IT ALONE! It HAPPENS! If you can't deal with it, don't bother having them. Otherwise, this conflict is gonna damage you both!
And by the way, PBL,
Isn't it selfish not to have children? After all, not only are you depriving someone of a potentionally very satisfying life, you might be depriving the world of a great artist, musician, philospher, scientist, etc.
You could be depriving someone of a really really HORRIBLE existence. Remember that the world at large has a very powerful effect on people and can overshadow and even corrupt the good traits they might have (Hitler wanted to be a painter, then his father and the world got to him. Results were catastrohpic to say the least.)
We already have 6-7 billion people, I think we are not in danger of running out of people yet. Let's focus on the world first, people later.