What are you talking about dude?
Common sense dictates that people have children. 2+1=3. 3>2. More people.
There is no solution. Communism could potentially bar people from having children, but that's pretty ridiculous.
As I said, there is NO solution. The earth will fill up and we will die of starvation.
edit: I apologize for being a dick. It seems like pretty basic knowledge though. If it bothers you try not to think about it.
Your common sense is way off dude.
If 2 people have one child, after the child's parents die there's less people than there was before the baby was born. If everyone would have just one baby, the population would gradually decrease, not increase. Population rises over the time, when the average number of babies per family is more than 2 (this is of course a very simplified explanation, in reality there's a lot of variables that matter). I didn't read the articles linked, so not sure if the "stages" of population progression was discussed there. I remember studying some of population progression theory on school. I think the stages of the common theory goes something like this:
1. First both the birth rate and death rate of a colony are high, so the population stays somewhat balanced.
2. When health care and technology and all sorts of other things that make it easier for people to stay alive improves the death rate decreases significantly, meaning that the birth rate exceeds death rate significantly which means an exponential increase in population.
3. During time the birth rate will gradually drop to a level that will be more balanced with death rate when people realize that they don't need to have 4 babies if they want 2 to live. During this period the birth rate is still higher than death rate so the population is still increasing, but is gradually slowing down.
4. At this point the birth and death rate have been stabilized and the population stays somewhat balanced again.
5. The population starts to decrease gradually because the people who were born in the exponential birth stage will begin to die, and the current birth rate is much lower.
I think that most of the developed countries are in stage 4 or 5 (Finland is in stage 5, for example), while most developing countries are in stage 2 or 3. This is obviously pretty simplified version of the theory and probably not that accurate, but I think it does give a good idea to exactly why the population rises, and why in some places it doesn't.
You can read more about it here:
http://en.wikipedia.org/wiki/Demographic_transitionThis obviously only explains the growth of population in small intervals, not in the grand scale.