In the
backwaters of Blogosphere there is nothing worse than speaking the
obvious. The flip side of that coin is
that there is nothing better than taking a viewpoint that the majority of
people believe to be right and showing it to be wrong. This is what I’m going to do with the 'overpopulation'
myth. The reason that the overpopulation scaremongering seems to be back in
vogue is because of the continual literature on climate change, and also
because recently the world population exceeded 7 billion (people love a good
round number as a catalyst for such pronouncements), which must mean the world
is overpopulated and that we are consuming far too many resources. Also
Professor Stephen Emmott of Oxford
University has been
pulling in the crowds with his Ten Billion lecture, which is a proclamation of
doom and gloom for the 21st century.
Professor
Stephen Emmott is preaching to the choir, because if you ask people whether
they think the world is overpopulated, most will tell you they feel sure it
is. There are two reasons for this (well
three actually, but I’ll come to the third in a while). The first reason is that ideas are like memes
– they are passed on in the form of cultural viruses (just like the biological
analogue). ‘The world is overpopulated’
is one of those memes – it has been heard so often that people just accept it
must be true. The second reason is a
development of the first reason; it is because people start with the natural
assumption of overpopulation that they find it very easy to observe evidence to
support their view. Whether it be a huge
metropolitan city ring road full of traffic at a stand still, or a London tube
station in rush hour, or a crowded African region struggling for food and
water, or a diminished animal community on the verge of extinction, it’s easy
to assume the world has too many people*.
People
are wrong about the over-crowdedness issue in a similar way to how they are
wrong about the over-pollution issue – in both cases they have their reasoning
backwards. To see why, we first need to
see why it is a good thing that you and I were born – and to do this we must go
back to 1798. The bad idea that “the
earth is overpopulated” was started most prominently by Thomas Malthus in his
1798 Essay on the Principle of Population, in which he argues that the population
increases geometrically but food supplies only increase arithmetically, which
means an eventual and inevitable case of worldwide famine and disease. I’ll explain what that means in a moment, and
why Malthus was wrong.
Now
there is no denying that in some parts of the world increased population, poor
resources and lack of birth control is a problem. But that doesn’t mean that the world is
overpopulated - it means that the population of people that are alive are not
doing as well as they could in aiding those that need more help than they are
getting. It is true that humans do
damage to the environment and to other animals, but a countersceptic could
point out that animals have been doing harm to other animals for millions of
years before humans came about - and also that environmental events have
‘damaged’ parts of the planet for even longer.
If you take the entire history of life that has ever lived on this
planet, over 99% of that life lived and became extinct before humans came about
– so it seems absurd to suggest that humans being alive is a unique and
unprecedented cost to the animal kingdom.
Here’s
what the sceptics fail to realise. Yes,
we certainly can do more to be mindful of other animals, but the fact that
there are parts of nature that are worse off because of humans is not an
argument that says there are too many humans, it is an argument that humans
need to be more mindful of the effects they have on nature, and seek better
ways to improve the status quo.
Similarly, the fact that there are so many divorces is not an argument
against marriage, it is an argument that humans need to be more mindful in
selecting the right partner, and work at being better husbands and wives. I’m going to show why the solution to the
‘natural’ problems that overpopulation proponents describe is not fewer people,
it is more people – which is why I say the world is under populated, not
overpopulated. To see why, let’s look at
how Malthus got his reasoning wrong. Malthus’s
distinction between Arithmetical ratios and Geometrical ratios is as follows:
Arithmetical
ratios (technology growth) are: 1, 2, 3, 4, 5, 6, 7, 8, 9 etc
Geometrical
ratios (population growth) are: 2, 4, 8, 16, 32, 64, 128, 256, 512 etc
What
he’s saying is that as the population grows and grows with increased rapidity,
the food supply grows at a much slower rate, leaving us eventually
over-populated and out of resources.
That’s what the ratios mean.
Malthus was right about these ratios up to the time of writing his essay
– but what he didn’t predict was how the world was about to change, most
notably with the Industrial Revolution** and later contraception. The reason Malthus got it wrong was that he
didn’t work out that progress in technology is proportional to the number of
people alive in the world, which means that technological growth will
eventually grow geometrically along with the population. In simple terms, with more people alive there
are more innovative ideas being produced at a greater rate. Before the world’s big population boom in the
past two centuries, technological progress was so slow that Arithmetical ratios
and Geometrical ratios were all but indistinguishable, because population
increase and technological innovation were slowly and steadily moving along the
same coterminous lines in history.
Geometrical ratios become more noticeable when you have a large
foundation to facilitate the exponential increase, and that happened after the
industrial revolution, and will continue to happen henceforward at an even
greater rate.
This is
the key distinction between qualitative changing and quantitative changing –
the former gives us the real breakthroughs in economic and technological
change, the latter only gives us more of the same. Here’s an example. It was once forecasted that economic progress
in Manhattan
was coming to a close because the island had nearly reached its capacity
regarding the horses it could contain.
If you’re only focusing on quantitative change your narrow vision only
has you looking to see where you can fit more horses; whereas if you’re
focusing on qualitative change you look to advance beyond horses to industrial
machinery, and eventually from industrial machinery to computers. Another example, the Great Irish Famine
wasn’t just due to unfortunate infestations in potatoes – it was over-reliance
on one single crop that severely added to the plight. Whether it is potatoes for food or horses for
transportation, it is important to diversify, because diversity leads to
increased qualitative change. That's
another reason why you can be sure that our technology will continue to
progress - we diversify our skills and our imagination by not having an
over-reliance on too narrow a range.
Consider
this in terms of an analogy in which we are recording planetary temperature.
Planet A increases its global temperature of 100 degrees at a rate of 1 degree
per year (arithmetical), whereas Planet B increases its global temperature of
100 degrees by 1% per year (geometrical).
In one thousand years Planet B, which is increasing geometrically, would
be 2000 times hotter than Planet A, and growing 2000 times faster too. If you looked at the temperature differential
in the first few years the difference between the two planets would be minimal
– whereas after a couple of thousand years it would be immense. That’s what is happening with our
technological progression – it is getting hotter and hotter because
technological progression is increasing like the heat on planet B, not Planet A
as Malthus thought. Our probability of
running out of any resources has always been superseded by our ability to
advance the sufficient technology or innovation to wean ourselves off the dependency
of those resources. It is the geometrical
ratios of both population growth and technological progression that make this
exponential progression more or less inevitable.
If you
want some kind of qualification for that, it’s easily done. I’ll give you some empirical indication based
on how the world has gone for the past 200,000 years. For the past 199,800 years we’ve had low
global populations, and humans lived in meagre conditions, with lots of
primitivism, low life expectancy and frequent infant mortality. Until recently in our 200,000 year history we
have lived in pretty poor circumstances, just above the subsistence level. Then a couple of hundred years ago something
changed. People started to become more
scientific, more empirically minded, richer, and populations began to increase
more rapidly (it’s still going on). This
progression can be explained by a simple rule of thumb – people innovate,
improve and provide answers to problems - and the more people, the more
innovation, improvements and problems solved.
The more ideas and the more people to share those ideas with, the more
humans prosper.
It’s no
coincidence that each half century has been progressively better than the last,
and that the most recent times have been the most globally prosperous than any
time in history. That’s largely because
we have 7 billion people on the planet – more ideas, more innovation, better
technology, improved economic freedom, peak human liberation, and more global
communication and potential to help the neediest***. When the world has 8 billion people it will
be even more prosperous; when it has 9 billion, yet even more prosperity. It’s no coincidence – the recent burst in
population in the past 200 years has been the primary cause of our burst in
prosperity (200 years is only 0.1% of 200,000 years). That we have a maximal population and
progression dialect in 0.1% of the entire human history suggests that the
answer to our worries about the world is that we haven’t had enough children in
the past 200 years, not that we’ve had too many.
It is
easy to look at some of the worst places in the world, like Africa****,
and say that many of the countries there have too many people in relation to
the available resources, and this is true.
But those countries do not amount to an argument that supports the
overpopulation proponents – they show that there are places in the world in
which the economic conditions are unable to take advantage of the benefits of
having a large pool of potential innovators, and fruitful trade potential. This is usually because the countries in
question are run by dictators or oppressive political groups that keep the
masses starved of food and knowledge.
They are being denied the very thing my argument says will enrich them –
the ability to contribute to their nation, and to the wider world. If simply having a densely populated nation
was inimical to success then Japan
and Hong Kong would be as bad as much of Africa.
It’s good that you were born
Now
that’s cleared up, let’s consider the costs and benefits of an individual being
born. First off, you probably know all
the facts about the incredibly tiny probability of the unique 'you' being born
- 1 in the millions of sperm that made it...same for your ancestors…etc etc -
so the upshot is you're very fortunate to be alive to experience a life on this
planet. I'm glad you were born, and I don't think you'd wish you weren't here
to experience life on this incredible planet.
If you'd never been born, your family would have ever so slightly more
resources consumed, due to your not being born to consume them – but your
family probably are the ones most glad you were born.
Notice I
said “your family would have ever so slightly more resources” not “the rest of
the world would have ever so slightly more resources. Let’s consider the resources humans
consume. It is thought by many that if
you weren’t born the rest of the world would gain from what you don’t
consume. That’s not true. When you were born you cost the world very
little; the only people who would have felt a cost would be the people whose
resources (time, energy, economic) you took up – and that would only really
apply to your immediate family. And as I
said, your immediate family are the ones who have gotten most pleasure out of
you – your parents spent a lot of time, energy and money on your upbringing,
but you (and any siblings you have) are probably their greatest joy in
life. If you hadn’t have been born your
family would have more resources, and the rest of the world would have the same
as before.
It is
clear that life has a multitude of net benefits that have no attached costs, as
well as costs that do have concomitant attached benefits, and also some net
costs too. I said the main costs you
bring are to your family – the reason being is that your external spillover
costs mostly have benefits for others, and most people’s net costs that confer
no benefits are comparably tiny.
Over-population theorists tend to only see the costs and miss the
benefits. The car in front of you in the
morning rush hour is imposing a cost because the driver is delaying your
journey slightly. But he is probably
going to his place of work in which the benefits he brings to the company, and
to society, far outweigh the costs of delaying your journey by a minuscule
amount. Your partaking in the auction on
Sunday helped bid the price up, which was a loss to the eventual buyer. But the buyer’s loss is simultaneously the
seller’s gain. If you are successful in
a job interview the other candidate sees you as a cost to his aspirations, but
you succeeded because the interviewers saw that you could bring more to the
company than the other candidate. His
loss is yours and the company’s gain.
The upshot is; it is easy to focus on the costs and omit the benefits.
Now
then, seeing as though the costs are minimal, let’s look at the benefits to
your being born. Apart from all the
obvious benefits you bring to your closest family, look what else you bring to
the world; you contribute skills, you earn money, you work, you are a friend to
many, a caring neighbour, a parent, a lover, you think up new ideas, you bring
a unique perspective based on a unique experience of the world, you bring
support, and conversation, and with that comes anecdotes, wisdom, retrospective
prudence, humour, and many more things.
The reason why your existence is a blessing to the world is the same
reason why increased population has made the world more prosperous; you have
brought much more into the world than you have drained from it.
Now
let’s consider the cost-benefit analysis from the point of view of the people
who chose to bring you into this world – your parents. When your parents decided to have you, they
knew that you would be a drain on their resources – both their financial
resources, and their time and energy.
But I’ll bet having you was one of the best days of their life – and
I’ll bet they haven’t regretted it since.
In other words, they focused on all those costs, weighed them up with
the benefit of having you, and thought you were worth having, even though they
must have overestimated the costs and underestimated the benefits. I say “underestimated the benefits” because to
begin with most parents think of a having a child only in terms of that effect
on the family life – they are not taking into account all those benefits I
mentioned above, because they are spillover benefits that come later, not
direct benefits to your parents. Hence,
they overestimated the costs and underestimated the benefits, and still thought
you were worth having – and that single case can be applied to the parents of
just about all children.
The ‘overcrowded’ myth
I’d
guess by now you’ve now got ahead of me and realised how fallacious the
over-crowded argument is. Crowded cities
are popular because people like to live in crowded cities. They like crowds because crowds have more
people, and more people means more of the benefits I mentioned above. Rural areas are quieter because fewer people
like to live in them, and house prices are very expensive in Central London and
Manhattan
because more people want to live there.
Its simple logic - the reason London has
8.6 million people and rural towns have only a few thousand is because more
people prefer to live in London
than they do rural towns. The reason being, not only is there is a greater
abundance of the aforementioned benefits in more populous areas, there is also
better career prospects, higher salaries, better nightlife, greater choices of
restaurants, a richer choice of entertainment, more tourist attractions, better
public transport, greater diversity of people – the list goes on.
On the
pollution argument, well, my 0.1% observation is a bit like the reverse of
pollution. The benefits of pollution
(profits from owning a factory, pleasure from driving a Subaru, etc) are
outweighed by the costs of pollution to others, which means polluters pollute
too much. Parents and prospective
parents vastly underestimate the benefits that children bring to the prosperity
of the world, so they end up having too few children. Progression and increased population is an
inevitable concomitance because each generation reaps the benefits of the
inventiveness of its ancestors. Not only
that, but population growth drives technological and industrial innovation,
which drives economic growth. The ‘overpopulation’
proponents have got their reasoning backwards; our improved technological
abilities and economic prosperity have both engendered significant population
growth as well. Economic prosperity has
continued to increase for the past two thousand years, with every century more
prosperous than the last, and this is because there are more people on earth to
contribute to the strategic and technological advancements.
So not
only is overpopulation a clear myth – the reverse is true - if you want to help
solve the problems of the world like damage to the environment, bad living
conditions for the neediest, and the diminishing populations of endangered
animal species, you’ve got more chance if you have six kids than if you have
none – because one of them just might be the one who puts a better solution in
place.