Although it may sound cold to some, the truth is that people don't consider the global population count in regards to their concerns about growth. Population growth is usually something one considers in regards to their own country, and within that country it's not uncommon to consider one's own demographic groups primarily.
As an example, I highly doubt a Japanese person concerned about birth rates is concerned about the boom in Africa and other distant nations. Japan's population is going to decline drastically in the coming years, and they don't want lots of immigration to make up for it. It won't surprise me if they do something weird eventually, like the state paying women to have children the state itself would raise. Technology like this could open up even more strange doors.
As an example, I highly doubt a Japanese person concerned about birth rates is concerned about the boom in Africa and other distant nations. Japan's population is going to decline drastically in the coming years, and they don't want lots of immigration to make up for it. It won't surprise me if they do something weird eventually, like the state paying women to have children the state itself would raise. Technology like this could open up even more strange doors.