You ask an excellent question. One that has been basically ignored since the publication of "The Population Bomb" back in the sixties.
I believe the reason no one wants to ask it publically, let alone deal with it, is that it has only two solutions (that I can think of):
1. You impose tyrannical reproduction constraints upon everyone (like China has attempted). This is pretty much guaranteed to outrage almost everybody, and probably trigger mass uprisings and revolts that you will have to put down by brutal force and the imposition of a police state. (Luckily, China already had a police state.
)
2. You let the Bomb explode -- which it must, eventually. This will result in mass starvation and disease, and probably lots of really ugly wars; a time which I call the "Great Die Off". But at least there won't be any "authority" to blame.
If the "Great Die Off" is only bad enough to kill off less than, say, 5% of the population, then you are faced with an unending series of "Great Die Offs", about one every 25 years.
The FUTURE -- Either live it or live with it.
