I think overpopulation is having/growing a population larger than you can support. I think this definition scales also. Don't have more kids than you can affor

I think overpopulation is having/growing a population larger than you can support. I think this definition scales also. Don't have more kids than you can afford to feed and educate. This applies to families and to countries. Societies facilitate this thru cooperation. Regarding places like sub-Saharan Africa, the land was ravaged to the point of desertification where they cannot grow food. And disease ravages them in a way that they have 5 children hoping 1 or 2 will survive to adulthood. Perhaps large-scale change can turn the tide on the desertification, so they can feed their population. And so they can fight disease and survive.