This ignores the social-scientific consensus that reducing infant mortality leads to reductions in family sizes. The moral dilemma you’re worried about doesn’t exist.
Citations needed. The relevant time horizons here are only 2-3 generations, do you suggest that societal norms will adapt faster than that (Edit: without accompanying larger efforts to build civil institutions)? The population explosion in, say, Bangladesh (1951: 42 million, 2011: 142 million) seems to suggest otherwise.
The phenomenon HaydnB refers to is the demographic transition, the theory of which is perhaps the best-established theory in the field of demography. Hereare two highly-cited reviews of the topic.
The relevant time horizons here are only 2-3 generations, do you suggest that societal norms will adapt faster than that? The population explosion in, say, Bangladesh (1951: 42 million, 2011: 142 million) seems to suggest otherwise.
HaydnB’s referring to family size, you’re referring to population, and it’s quite possible for the second to increase even as the first drops. This appears to be what happened in Bangladesh. I have not found any data stretching back to 1951 for completed family size in Bangladesh, but here is a paper that plots the total fertility rate from 1963 to 1996: it dropped from just under 8 to about 3½. I did find family size data going back to 1951 for neighbouring India: it fell from 6.0 in 1951 to 3.3 in 1997, with a concurrent decrease in infant mortality.
So I’m not HaydnB, but I have to answer your question with a “yes”: fertility norms can change, and have changed, greatly in the course of 2-3 generations. Bangladesh’s population, incidentally, is due to top out in about 40 years at ~200 million, only 40% higher than its current population.
During the transition, first mortality and then fertility declined, causing population growth rates first to accelerate and then to slow again, moving toward low fertility, long life and an old population.
From the second review:
It is true, however, that mortality reductions in poor countries and the consequent
rapid growth of population may impede capital formation and other aspects of
development. (Goes on to call the consequences mostly positive.)
Like Democratic Peace Theory, the demographic transition has historically been modeled after the now developed countries. At least that is where we get the latter “stages” from. Countries in which the reduction in mortality was achieved from within the country, a token of the relative strength of some aspects of its civil society. Not countries in which mortality reduction would be a solely external influence, transplanted from a more developed society into a tribal society.
but I have to answer your question with a “yes”: fertility norms can change, and have changed
Note that the question was whether societal norms will adapt faster than that, not whether they can and have in e.g. European countries. Especially if—and that’s the whole point of the dilemma—there are stark interventions (AMF) only in infant and disease mortality, without the much more difficult and costly interventions in nation building.
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. Once you’re over the brink, a silver lining at the horizon isn’t as relevant.
As with the Bangladesh example, “only 40% higher than its current population” (and Bangladesh is comparatively developed anyways), if that figure translated (which it doesn’t) to Sub-Saharan populations, that would already be a catastrophe right there.
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?
HaydnB doesn’t see the dilemma, since he seems to say that taking a tribal society, then externally implementing mortality reductions without accompanying large scale nation building will still reduce family sizes drastically, to the point that there are no larger scale catastrophes, even without other measures.
[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.
This ignores the social-scientific consensus that reducing infant mortality leads to reductions in family sizes. The moral dilemma you’re worried about doesn’t exist.
Citations needed. The relevant time horizons here are only 2-3 generations, do you suggest that societal norms will adapt faster than that (Edit: without accompanying larger efforts to build civil institutions)? The population explosion in, say, Bangladesh (1951: 42 million, 2011: 142 million) seems to suggest otherwise.
The phenomenon HaydnB refers to is the demographic transition, the theory of which is perhaps the best-established theory in the field of demography. Here are two highly-cited reviews of the topic.
HaydnB’s referring to family size, you’re referring to population, and it’s quite possible for the second to increase even as the first drops. This appears to be what happened in Bangladesh. I have not found any data stretching back to 1951 for completed family size in Bangladesh, but here is a paper that plots the total fertility rate from 1963 to 1996: it dropped from just under 8 to about 3½. I did find family size data going back to 1951 for neighbouring India: it fell from 6.0 in 1951 to 3.3 in 1997, with a concurrent decrease in infant mortality.
So I’m not HaydnB, but I have to answer your question with a “yes”: fertility norms can change, and have changed, greatly in the course of 2-3 generations. Bangladesh’s population, incidentally, is due to top out in about 40 years at ~200 million, only 40% higher than its current population.
From the first review:
From the second review:
Like Democratic Peace Theory, the demographic transition has historically been modeled after the now developed countries. At least that is where we get the latter “stages” from. Countries in which the reduction in mortality was achieved from within the country, a token of the relative strength of some aspects of its civil society. Not countries in which mortality reduction would be a solely external influence, transplanted from a more developed society into a tribal society.
Note that the question was whether societal norms will adapt faster than that, not whether they can and have in e.g. European countries. Especially if—and that’s the whole point of the dilemma—there are stark interventions (AMF) only in infant and disease mortality, without the much more difficult and costly interventions in nation building.
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. Once you’re over the brink, a silver lining at the horizon isn’t as relevant.
As with the Bangladesh example, “only 40% higher than its current population” (and Bangladesh is comparatively developed anyways), if that figure translated (which it doesn’t) to Sub-Saharan populations, that would already be a catastrophe right there.
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?
HaydnB doesn’t see the dilemma, since he seems to say that taking a tribal society, then externally implementing mortality reductions without accompanying large scale nation building will still reduce family sizes drastically, to the point that there are no larger scale catastrophes, even without other measures.
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.