[L] Even so, the shift in the centre of gravity to older age groups is bound to have a profound effect on societies, not just economically and politically but in all sorts of other ways too. Richard Jackson and Neil Howe of Americas CSIS, in a thoughtful book called The Graying of the Great Powers, argue that, among other things, the ageing of the developed countries will have a number of serious security implications.
[M] For example, the shortage of young adults is likely to make countries more reluctant to commit the few they have to military service. In the decades to 2050, America will find itself playing an ever-increasing role in the developed worlds defence effort. Because Americas population will still be growing when that of most other developed countries is shrinking, America will be the only developed country that still matters geopoliticallyi 地 缘政治上).
Ask me in 2020
[ N] There is little that can be done to stop population ageing, so the world will have to live with it. But some of the consequences can be alleviated. Many experts now believe that given the right policies, the effects, though grave, need not be catastrophic. Most countries have recognised the need to do something and are beginning to act.
[ O] But even then there is no guarantee that their efforts will work. What is happening now is historically unprecedented. Ronald Lee, director of the Centre on the Economics and Demography of Ageing at the University of California, Berkeley, puts it briefly and clearly: We dont really know what population ageing will be like, because nobody has done it yet.
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