[quotations from reviews about population growth, emphasizing rapid/accelerating population growth]
These are consistent with what I wrote. Moreover, the world has already passed through the phase of accelerating population growth. The world’s population was increasing most rapidly 20-50 years ago (the exact period depends on whether one considers relative or absolute growth rates).
Like Democratic Peace Theory, the demographic transition has historically been modeled after the now developed countries. [...] Not countries in which mortality reduction would be a solely external influence, transplanted from a more developed society into a tribal society.
True enough, but mostly a moot point nowadays, because we’re no longer just predicting a fertility decline based on history; we’re watching it happen before our eyes. The global total fertility rate (not just mortality) has been in freefall for 50 years and even sub-Saharan Africa has had a steadily falling TFR since 1980.
Note that the question was whether societal norms will adapt faster than that, not whether they can and have in e.g. European countries.
Right, but the fact that they can change, have changed, and continue to change (in two large, poor, and very much non-European countries) is good evidence they’ll carry on changing. If medical interventions and other forms of non-institutional aid haven’t arrested the TFR decline so far, why would they arrest it in future?
Will reducing infant / disease mortality alone thrust a country into a more developed status? Rather the contrary, since even the sources agree that the immediate effect would be even more of the already catastrophic population growth.
The long-run effect matters more than the immediate effect (which ended decades ago).
The question is, without nation building, would such countries be equipped to deal with just a 40% population rise over 40 years, let alone the one that’s actually prognosticated?
The question I was addressing was the narrower one of whether reducing infant mortality reduces family sizes. Correlational evidence suggests (though does not prove) it does, maybe with a lag of a few years. I know of no empirical evidence that reductions in infant mortality increase family size in the long run, although they might in the short run.
Still, I might as well comment quickly on the broader question. As far as I know, the First World already focuses on stark interventions (like mass vaccination) more than nation building, and has done since decolonization. This has been accompanied by large declines in infant mortality, TFRs & family sizes, alongside massive population growth. It’s unclear to me why carrying on along this course will unleash disaster, not least because the societies you’re talking about are surely less “tribal” now than they were 10 or 20 or 50 years ago.
I don’t want to come off as Dr. Pangloss here. It’s quite possible global disaster awaits. But if it does happen, I’d be very surprised if it were because of the mechanism you’re proposing.
These are consistent with what I wrote. Moreover, the world has already passed through the phase of accelerating population growth. The world’s population was increasing most rapidly 20-50 years ago (the exact period depends on whether one considers relative or absolute growth rates).
True enough, but mostly a moot point nowadays, because we’re no longer just predicting a fertility decline based on history; we’re watching it happen before our eyes. The global total fertility rate (not just mortality) has been in freefall for 50 years and even sub-Saharan Africa has had a steadily falling TFR since 1980.
Right, but the fact that they can change, have changed, and continue to change (in two large, poor, and very much non-European countries) is good evidence they’ll carry on changing. If medical interventions and other forms of non-institutional aid haven’t arrested the TFR decline so far, why would they arrest it in future?
The long-run effect matters more than the immediate effect (which ended decades ago).
The question I was addressing was the narrower one of whether reducing infant mortality reduces family sizes. Correlational evidence suggests (though does not prove) it does, maybe with a lag of a few years. I know of no empirical evidence that reductions in infant mortality increase family size in the long run, although they might in the short run.
Still, I might as well comment quickly on the broader question. As far as I know, the First World already focuses on stark interventions (like mass vaccination) more than nation building, and has done since decolonization. This has been accompanied by large declines in infant mortality, TFRs & family sizes, alongside massive population growth. It’s unclear to me why carrying on along this course will unleash disaster, not least because the societies you’re talking about are surely less “tribal” now than they were 10 or 20 or 50 years ago.
I don’t want to come off as Dr. Pangloss here. It’s quite possible global disaster awaits. But if it does happen, I’d be very surprised if it were because of the mechanism you’re proposing.