DD, what's up? I've just read through the last 20+ posts, and while the last few have a brighter side, some of those earlier ones, well... real downers?
Glad to hear things are going well for you, in regards to your partner. Having kids is a big responsibility, and as others have said and even yourself said, only do it for the right reasons.
During the period in my life where things weren't going so well, (my divorce, etc which most of you know about), I had a lot of thoughts like you have posted about. In the end, one of my mum's friends said to me, "As long as you have a roof over your head, a warm bed to sleep in, and a warm meal each day, your a hell of a lot better than a lot of people out there...". I had all three, and was still depressed. I guess, modern Western society places a too high standard on who and what we should be. Once I realised all the stress I was placing on myself was my own doing, I longer was stressed and I started enjoying life again!
Now things have changed for me personally. My divorce should be finalised in just over a week, I've been dating a beautiful woman for the last 5mths, and am happy in life. My personal fitness has only been better when I was serving in the Army, (not bad for a 30yr old), and am happy/content with what I have. I don't have too many cares at the moment.
My girlfriend and I have been talking about moving in together at the end of the year (our current living arrangements suite both of us work wise, and at the end of the year she'll be relocating work-wise closer to where I work). We've talked about kids, etc... And the thing about kids, we both agreed that one is all we should have, simple because that's all we can properly support.
Now enough on me, the whole lets reduce the world population by x, well I tend to agree in principle. The world as it is now does not have the resources to cope with the current human population. I was watching a TV Show on ABC (Australian Broadcasting Corp), about human population growth, and basically, once we get to around 2060-2070 we are screwed. The Earth simply will run out of resources to support the human/animal/plant population if current population growth continues at the current rate. I think "Agent Smith" said it best in the Matrix, human kind is a virus, one that should be stopped and controlled. IIRC, even China has government endorsed restrictions on population growth. Has China got it right?
On a more controversial note, are diseases like HIV/AIDS, Bird Flu, Cancer, etc, just Natures way of controlling the human population? Is Nature trying to tell us something and we as a whole not listening?