This is all bad (about the negative points). This all happens while in many developed countries families often either have 1 child or not at all. Now it is inconspicuous, but imagine what will happen in 50 years. The population is going down a lot. Therefore it is not necessary to go to extremes. The problem is not overpopulation, but how it is organized. But I agree that on one territory there should be such a number of people who will be comfortable. There should be so much land that every person can be full when some kind of agro culture is grown on these lands