I quite agree with you that much of the problem has been introduced through perverse immigration laws mostly set in place by Teddy Kennedy. As the third world becomes more wealthy, experience teaches that it will tend to moderate its population growth. As with the environment, capitalism is the best medicine for undesirable population growth.
My objection is to contraindicated subsidies and tax incentives to increase population as well as perverse immigration practices. Increasing population is not, repeat not, a good thing but it is not nearly as bad a thing as draconian one child policies such as we see in China.
The total number of people is, in fact, increasing ... but that growth is almost all in 3rd-world and/or developing countries. Almost none of it is in 1st-world countries.
But my concern is with the fact that the population in America has doubled in my lifetime and that doubling constitutes a threat to conservative constitutional principles.
Agreed. But as you say, that growth is currently fueled mostly by immigration, rather than by birth rates.
The premise of the article is that "one-child" policies are required to address is ... but the fact is that other, much different, approaches are more suitable for an immigration-driven population growth.