We are a commune of inquiring, skeptical, politically centrist, capitalist, anglophile, traditionalist New England Yankee humans, humanoids, and animals with many interests beyond and above politics. Each of us has had a high-school education (or GED), but all had ADD so didn't pay attention very well, especially the dogs. Each one of us does "try my best to be just like I am," and none of us enjoys working for others, including for Maggie, from whom we receive neither a nickel nor a dime. Freedom from nags, cranks, government, do-gooders, control-freaks and idiots is all that we ask for.
If all we look at is the US then you are correct a slower population growth rate would be fine.
On the other hand, if we look at the entire world we need more people in the US. Lots more.
Japan is the oldest country in the world and aging and declining rapidly. In the next few decades its average age will rise to 65. Alone it would be a problem. It is not.
Russia, the former Soviet Union nations and Eastern Europe are also aging and declining rapidly. Although Russia and some of these nations will be able to handle this decline fairly well, not all will. Many of these countries are smaller each and every year. If Russia solves is premature death problem it will age faster than any country ever.
Western Europe is also aging and declining rapidly. For all practical purposes Europe has lain down to die and is just waiting for the reaper to call.
Then there is China the only country in the world to create an oldster boom which will age the country to the point of decay and decline long before it can become wealthy. China's "Little Emperors" will be shocked once the dynamic dashes their dreams; worse yet, the 40-60 million excess male "Little Emperors” may damage China long before the demographic time bomb can do its ugly work.
The upshot is fewer people. The down is the possibility of destabilization, nationalism (especially in Europe), and political instability. European war so long out of mind will be something to worry about if the process continues unabated and the Muslim population continues to grow but remains unassimilated. Economically we face a likelihood of deep sustained deflation. After all old people do not consume and the young will be too busy caring for the old to consume. Prices will decline perhaps catastrophically. QE and the other tricks of inflation which seem to still work today will not.
The way out is the US engine of prosperity driven by lower taxes, fewer regulations, greater personal liberty, and more workers, lots more workers. You may not like the role the world has forced upon us but it is no different than the role forced upon our predecessors.
The only hope we have right now is to kick start Europe by pulling out of NATO and removing US troops from Europe. This may cause a sufficient startle and self-preservation response to reanimate our European Rip Van Winkle.
Lower population here wouldn't be bad, if it happened in a vacuum, but it's not. The US is, as MD alluded to, the last bastion of freedom and liberty, and I think that's no exaggeration.
Western Civilization is about to get swamped.
"Here's an interesting factoid. The entire world's population, all 7 billiion, could fit into Texas with about 500 sq feet of living space and still have room left over.
So how overpopulated could we be? :>)"
No roads,no sidewalks even, no public works (water plants/ sewage treatment plants ...), no farms, no parks, no wild spaces, no schools , no businesses, no public space whatsoever but what the heck everybody has almost 22.5 sq ft by 22.5 sq ft each. Lovely thought but even at a very low 1.1% population growth rate our pop will double in less than 70 years and quadruple in less than 140 years and be 8 fold in 280 years so how will our country look with 5.4 billion
560 years ? There must be a limit and intelligent people would prefer to tackle it before we hit 10.4 billion in the U.S. alone a thousand years from today if we can limit total growth to an unrealistically mere 1.1% annually including legal immigrants illegal aliens.
western nations, not counting immigration from mostly muslim countries (and to an extent others, mostly sleezeballs who're only interested in cashing in social security checks and mugging the locals) have seen negative population growth for several decades.
This is turning the US into Mexico-norte, and Europe into New Morocco.