Overpoppulation Myth Unravelling!
I think most people have heard for so long that there is a human overpopulation problem that they take it for granted. While this theory, that there are too many people on the planet, or there will be unless measures are taken, seems to be utterly without merit. In fact the exact opposite may be true, that there is an underpopulation problem.
Most developing countries with the exception of the US have below replacement birth rates, yet I still hear some people talk about how they don't want children because there are "too many people." China is a great example of this paranoia in action, with their infamous one child policy. That's managed to upset the gender balance causing many more boys to be born than girls, but it hasn't done much to change their already declining birth rate.
Certainly there are large cities that have population issues to deal with such as transportation, education, etc, but these problems are only related to organizational and logistical shortcomings of governments. Logically populations migrate to areas with more opportunities and better resources, so instead of trying to control the amount of people on the planet, we should make it more attractive for them to move to areas where they are needed and respected.