If population poses a problem, it is likely due to distribution, not to growth. After all, only so many people can fit on the coasts of China, India, and the United States. There are many wide-open spaces for the population to expand. The trick will be to figure out a way to incentivize responsible growth, not to discourage it entirely.
Instead of focusing on controlling population growth, a better way to tackle poverty is to help solve humanity’s basic problems. Infectious disease, corrupt governance, and lack of access to global markets are Africa’s biggest problems. When these devastating issues are corrected, African countries could experience rapid economic growth in the same way as did the Asian Tigers.
When the world becomes a more prosperous place, the “problem” of population growth will largely take care of itself.