> We still have a birth rate that is too high. It will be a long long time before we need to work on raising the birth rate and the problem isn't that complex.
Do you have any citations for this? Not snarking—genuinely curious, not arguing, but I was under the impression that most population growth in developed countries like the U.S. was due to immigration rather than above-replacement fertility rates.
It probably depends on the metric you're trying to optimize. I was curious about that as well, but I was thinking in terms of the maximum number of humans the earth can support. We certainly haven't hit that yet, we have large swaths of land allocated to relatively inefficient means of producing food (i.e. cattle).
Also, don't we need some level of population growth for Social Security to function correctly? We could replace Social Security, but it would be difficult and expensive.
Do you have any citations for this? Not snarking—genuinely curious, not arguing, but I was under the impression that most population growth in developed countries like the U.S. was due to immigration rather than above-replacement fertility rates.