system
Given the following post, respond as if you're commenting on Reddit:
human
I believe there should be a cap on the number of children a family can have. CMV

We as a race seem to be overpopulating the planet. Certain families have so many children that they cannot provide for them all. Resources are limited, and if we were to put a limit on how many children a family can have (like what they do in China), the quality of life for those who are born into the world would increase, especially in countries/regions where resources are scarce.
gpt
Areas of the planet in which a limit on children could be applied *are not* contributing to global overpopulation. In fact, Western 1st-World democracies are experiencing *negative* population growth (or at least a decline in rates of population increase) as a result of expanding rights for women, increased access to family planning, and the necessity of a 2-income family to support a 1st World lifestyle. 

The areas of the world that are contributing to global overpopulation lack the central governmental authority to implement or enforce a limit on reproduction. Tribal, familial, or local systems of governance have no vested interest in limiting the growth of their population. In fact, due to extreme infant mortality and an agrarian subsistence lifestyle, these people *rely* on large families for their survival. Should the UN or the US mobilize troops to Sub-Saharan Africa to forcibly sterilize women? 

The fact is that, if our use of global arable farmland and fresh water was optimized, Earth would be able to support up to 16 billion people: 9 billion more than our current population. The problem isn't that poorer countries produce too many people: the problem is that Western societies consume a disproportionate amount of resources relative to their population. Coupled with our declining birthrates, our ever-increasing consumption, and our increasingly service-based (as opposed to production-based) economies: we *need* poor countries to keep increasing their populations to produce our goods, mine our resources, and immigrate to take low-skill, low-paying jobs - in order to sustain our current standard of living and our aging population.