I personally believe that it is selfish to have more than two biological children (regardless of our means to support them). If we look at the crises looming on the horizon for the world pretty much all of them can be traced back to over-population:
- Food shortages
- Energy depletion
- Pollution
- Global Warming
- Species extinction
- Territorial/Energy wars
- Lethal pandemics
- deforestation and desertification
To put it bluntly, there are too many people on this planet already and not enough resources. The world population reached 7 billion recently. In 1974, just half a life-time ago, it was 4 billion.
The only way to reduce this number is for people to have less children. If a couple have 2 children between them, then they will have replaced themselves. If however, they have, for example, 4 children, they have increased the total number of humans by 2. That's 2 extra people who need a lifetime's supply of food, drinking water, living area and energy.
As the numbers of people pile up the quality of life on this planet is going to drop for everyone. This is true even in a relatively low population density western countries. Our lifestyle is based on a large supply of energy and resources which are diverted from other countries.
I realise that this may be a controversial opinion. This thread came about as a result of an argument I had with a friend of mine, who happens to be a student obstetrician. Needless to say she was horrified by my point of view.
It's a complex and emotive topic and a lot of questions are thrown up. I'll try and go through some of the ones I can imagine:
Q. Well, I can kinda see your point but I want to have a big family anyway.
A. Why not have two of your own and adopt and foster some more?
Q. How about all those people in Asia and Africa having 8 children. They're the ones who need to be responsible not us!
A. Family size is coming down across the developing world with the rise in education and contraception. In the developed world we have to lead by example since we really do have the luxury of choosing (with our social security and healthcare net). We also consume far more resources per capita than the average person from the developed world so it's not as lopsided as it first appears.
Q This doesn't apply to me, I've earned enough money so that I can support a large family of my own.
A The number of resources on the planet is fixed. If you are wealthy and can afford more that just means that you're going to be taking someone else's share.
Q Surely we can continue at our present growth rates so long as we cut down our carbon footprints and grow sustainability.
A When it comes to human population, the only sustainable growth is zero growth.