There are some people out there who think we won't be overpopulated so long as you can literally stack people like cordwood, and who see pollution control laws, the rising price of energy, and the growth of government as something the evil left does for fun, just to make our lives miserable.
And not because all those are designed mostly to counter the stresses of overpopulation.
Outside of India and China, no other country on earth is packed with as many people as is the U.S.A.
Worse, the population density of New Jersey exceeded that of China years ago--but some people will blame the loss of freedom and bloated government in New Jersey, on some kind of socialist plot.
If the folks who populate NJ continue down the path of socialism and leftism then yes I’d agree with you.
Not sold on the idea of overpopulation so long as the culture remains conservative & the values are conservative.
I would much prefer a nation of 400 million who are dogmatically conservative than a nation of 50 million liberals.