From tiny acorns
Birthrates aren’t uniform, however. Some groups within each nation tend to have more children than others – the Amish being a noteworthy example. We might assume that doesn’t matter. After all, given a US population of more than 300 million people, what difference can an isolated group of 300,000 make?
Quite a lot as it happens.
There’s a old story about an emperor who wished to reward a merchant who had done him a great service. “Name anything you desire,” said the emperor. The merchant produced a chessboard and asked for one grain of rice to be placed on the first square, two grains on the second square, four grains on the third and so forth – the number of grains doubling each time for every square on the board. “Is that all that you want,” asked the emperor, “a few piles of rice?” It wasn’t until the 17th square that more than a kilogram of rice was required. But by 27th square, it was more than a tonne – and by the 32nd square more than 40 tonnes.8 It was then that the emperor realised that he’d been had. The second half of the chessboard would drain the empire, indeed the whole world, many times over – or it might have done had the emperor not chopped the merchant’s head off for being a clever dick.
The point of this pretty tale is that exponential growth matters. Obviously, the Amish can’t continue doubling their numbers every generation forever. But if they keep it up for another century then there will be eight million of them. If they keep it up for two centuries, America will be a majority Amish nation. Even today, their numbers are big enough in some parts of the country for campaigners to go after their votes – as the existence of Amish PAC attests.
Of course, that assumes not only that the Amish continue to grow at their current rate, but also that no one else keeps pace with them. In fact, there are a few other groups in America with above average fertility – the Mormons,9 for instance. One can imagine a Mormon majority expanding outwards from Utah, while an Amish majority does so from rural Pennsylvania – until they meet somewhere in the middle. If war breaks out, it’ll be a rather one-sided one – the Amish are pacifists.
Decline and fall?
Admittedly, this is a rather extreme scenario, but then we live in extreme times. Keeping a population stable requires a fertility rate of just above two. It is below that across the western world and still falling. It is 1.6 in Canada, 1.5 in Germany, 1.4 in Spain, 1.3 in Greece, 1.2 in Taiwan.10 A fertility rate of 1.41, by the way, means that the size of each new generation halves every two generations.
Immigration can help stave off population decline, though the flip-side, i.e. emigration, can accelerate decline elsewhere. It’s also worth noting that, in America, the birth rate among the immigrant population is declining even faster than among the US-born population.11
We should of course, be grateful for the choices that we have in a liberal society. We are free to marry or not get married. We are free to have children or not have children. There are lifestyles and occupations open to us that are not open to people (especially women) in less liberal societies. And yet, by definition, the only cultures that will survive into the centuries ahead are those that reproduce themselves.
It is said that history is made by those who turn up. But it’s equally true that the future belongs to those who have children.
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