Automation anxiety has been spreading lately,
a fear that in the future,
many jobs will be performed by machines
rather than human beings,
given the remarkable advances that are unfolding
in artificial intelligence and robotics.
What's clear is that there will be significant change.
What's less clear is what that change will look like.
My research suggests that the future is both troubling and exciting.
The threat of technological unemployment is real,
and yet it's a good problem to have.
And to explain how I came to that conclusion,
I want to confront three myths
that I think are currently obscuring our vision of this automated future.
A picture that we see on our television screens,
in books, in films, in everyday commentary
is one where an army of robots descends on the workplace
with one goal in mind:
to displace human beings from their work.
And I call this the Terminator myth.
Yes, machines displace human beings from particular tasks,
but they don't just substitute for human beings.
They also complement them in other tasks,
making that work more valuable and more important.
Sometimes they complement human beings directly,
making them more productive or more efficient at a particular task.
So a taxi driver can use a satnav system to navigate on unfamiliar roads.
An architect can use computer-assisted design software
to design bigger, more complicated buildings.
But technological progress doesn't just complement human beings directly.
It also complements them indirectly, and it does this in two ways.
The first is if we think of the economy as a pie,
technological progress makes the pie bigger.
As productivity increases, incomes rise and demand grows.
The British pie, for instance,
is more than a hundred times the size it was 300 years ago.
And so people displaced from tasks in the old pie
could find tasks to do in the new pie instead.
But technological progress doesn't just make the pie bigger.
It also changes the ingredients in the pie.
As time passes, people spend their income in different ways,
changing how they spread it across existing goods,
and developing tastes for entirely new goods, too.
New industries are created,
new tasks have to be done
and that means often new roles have to be filled.
So again, the British pie:
300 years ago, most people worked on farms,
150 years ago, in factories,
and today, most people work in offices.
And once again, people displaced from tasks in the old bit of pie
could tumble into tasks in the new bit of pie instead.
Economists call these effects complementarities,
but really that's just a fancy word to capture the different way
that technological progress helps human beings.
Resolving this Terminator myth
shows us that there are two forces at play:
one, machine substitution that harms workers,
but also these complementarities that do the opposite.
Now the second myth,
what I call the intelligence myth.
What do the tasks of driving a car, making a medical diagnosis
and identifying a bird at a fleeting glimpse have in common?
Well, these are all tasks that until very recently,
leading economists thought couldn't readily be automated.
And yet today, all of these tasks can be automated.
You know, all major car manufacturers have driverless car programs.
There's countless systems out there that can diagnose medical problems.
And there's even an app that can identify a bird
at a fleeting glimpse.
Now, this wasn't simply a case of bad luck on the part of economists.
They were wrong,
and the reason why they were wrong is very important.
They've fallen for the intelligence myth,
the belief that machines have to copy the way
that human beings think and reason
in order to outperform them.
When these economists were trying to figure out
what tasks machines could not do,
they imagined the only way to automate a task
was to sit down with a human being,
get them to explain to you how it was they performed a task,
and then try and capture that explanation
in a set of instructions for a machine to follow.
This view was popular in artificial intelligence at one point, too.
I know this because Richard Susskind,
who is my dad and my coauthor,
wrote his doctorate in the 1980s on artificial intelligence and the law
at Oxford University,
and he was part of the vanguard.
And with a professor called Phillip Capper
and a legal publisher called Butterworths,
they produced the world's first commercially available
artificial intelligence system in the law.
This was the home screen design.
He assures me this was a cool screen design at the time.
(Laughter)
I've never been entirely convinced.
He published it in the form of two floppy disks,
at a time where floppy disks genuinely were floppy,
and his approach was the same as the economists':
sit down with a lawyer,
get her to explain to you how it was she solved a legal problem,
and then try and capture that explanation in a set of rules for a machine to follow.
In economics, if human beings could explain themselves in this way,
the tasks are called routine, and they could be automated.
But if human beings can't explain themselves,
the tasks are called non-routine, and they're thought to be out reach.
Today, that routine-nonroutine distinction is widespread.
Think how often you hear people say to you
machines can only perform tasks that are predictable or repetitive,
rules-based or well-defined.
Those are all just different words for routine.
And go back to those three cases that I mentioned at the start.
Those are all classic cases of nonroutine tasks.
Ask a doctor, for instance, how she makes a medical diagnosis,
and she might be able to give you a few rules of thumb,
but ultimately she'd struggle.
She'd say it requires things like creativity and judgment and intuition.
And these things are very difficult to articulate,
and so it was thought these tasks would be very hard to automate.
If a human being can't explain themselves,
where on earth do we begin in writing a set of instructions
for a machine to follow?
Thirty years ago, this view was right,
but today it's looking shaky,
and in the future it's simply going to be wrong.
Advances in processing power, in data storage capability
and in algorithm design
mean that this routine-nonroutine distinction
is diminishingly useful.
To see this, go back to the case of making a medical diagnosis.
Earlier in the year,
a team of researchers at Stanford announced they'd developed a system
which can tell you whether or not a freckle is cancerous
as accurately as leading dermatologists.
How does it work?
It's not trying to copy the judgment or the intuition of a doctor.
It knows or understands nothing about medicine at all.
Instead, it's running a pattern recognition algorithm
through 129,450 past cases,
hunting for similarities between those cases
and the particular lesion in question.
It's performing these tasks in an unhuman way,
based on the analysis of more possible cases
than any doctor could hope to review in their lifetime.
It didn't matter that that human being,
that doctor, couldn't explain how she'd performed the task.
Now, there are those who dwell upon that the fact
that these machines aren't built in our image.
As an example, take IBM's Watson,
the supercomputer that went on the US quiz show "Jeopardy!" in 2011,
and it beat the two human champions at "Jeopardy!"
The day after it won,
The Wall Street Journal ran a piece by the philosopher John Searle
with the title "Watson Doesn't Know It Won on 'Jeopardy!'"
Right, and it's brilliant, and it's true.
You know, Watson didn't let out a cry of excitement.
It didn't call up its parents to say what a good job it had done.
It didn't go down to the pub for a drink.
This system wasn't trying to copy the way that those human contestants played,
but it didn't matter.
It still outperformed them.
Resolving the intelligence myth
shows us that our limited understanding about human intelligence,
about how we think and reason,
is far less of a constraint on automation than it was in the past.
What's more, as we've seen,
when these machines perform tasks differently to human beings,
there's no reason to think
that what human beings are currently capable of doing
represents any sort of summit
in what these machines might be capable of doing in the future.
Now the third myth,
what I call the superiority myth.
It's often said that those who forget
about the helpful side of technological progress,
those complementarities from before,
are committing something known as the lump of labor fallacy.
Now, the problem is the lump of labor fallacy
is itself a fallacy,
and I call this the lump of labor fallacy fallacy,
or LOLFF, for short.
Let me explain.
The lump of labor fallacy is a very old idea.
It was a British economist, David Schloss, who gave it this name in 1892.
He was puzzled to come across a dock worker
who had begun to use a machine to make washers,
the small metal discs that fasten on the end of screws.
And this dock worker felt guilty for being more productive.
Now, most of the time, we expect the opposite,
that people feel guilty for being unproductive,
you know, a little too much time on Facebook or Twitter at work.
But this worker felt guilty for being more productive,
and asked why, he said, "I know I'm doing wrong.
I'm taking away the work of another man."
In his mind, there was some fixed lump of work
to be divided up between him and his pals,
so that if he used this machine to do more,
there'd be less left for his pals to do.
Schloss saw the mistake.
The lump of work wasn't fixed.
As this worker used the machine and became more productive,
the price of washers would fall, demand for washers would rise,
more washers would have to be made,
and there'd be more work for his pals to do.
The lump of work would get bigger.
Schloss called this "the lump of labor fallacy."
And today you hear people talk about the lump of labor fallacy
to think about the future of all types of work.
There's no fixed lump of work out there to be divided up
between people and machines.
Yes, machines substitute for human beings, making the original lump of work smaller,
but they also complement human beings,
and the lump of work gets bigger and changes.
But LOLFF.
Here's the mistake:
it's right to think that technological progress
makes the lump of work to be done bigger.
Some tasks become more valuable. New tasks have to be done.
But it's wrong to think that necessarily,
human beings will be best placed to perform those tasks.
And this is the superiority myth.
Yes, the lump of work might get bigger and change,
but as machines become more capable,
it's likely that they'll take on the extra lump of work themselves.
Technological progress, rather than complement human beings,
complements machines instead.
To see this, go back to the task of driving a car.
Today, satnav systems directly complement human beings.
They make some human beings better drivers.
But in the future,
software is going to displace human beings from the driving seat,
and these satnav systems, rather than complement human beings,
will simply make these driverless cars more efficient,
helping the machines instead.
Or go to those indirect complementarities that I mentioned as well.
The economic pie may get larger,
but as machines become more capable,
it's possible that any new demand will fall on goods that machines,
rather than human beings, are best placed to produce.
The economic pie may change,
but as machines become more capable,
it's possible that they'll be best placed to do the new tasks that have to be done.
In short, demand for tasks isn't demand for human labor.
Human beings only stand to benefit
if they retain the upper hand in all these complemented tasks,
but as machines become more capable, that becomes less likely.
So what do these three myths tell us then?
Well, resolving the Terminator myth
shows us that the future of work depends upon this balance between two forces:
one, machine substitution that harms workers
but also those complementarities that do the opposite.
And until now, this balance has fallen in favor of human beings.
But resolving the intelligence myth
shows us that that first force, machine substitution,
is gathering strength.
Machines, of course, can't do everything,
but they can do far more,
encroaching ever deeper into the realm of tasks performed by human beings.
What's more, there's no reason to think
that what human beings are currently capable of
represents any sort of finishing line,
that machines are going to draw to a polite stop
once they're as capable as us.
Now, none of this matters
so long as those helpful winds of complementarity
blow firmly enough,
but resolving the superiority myth
shows us that that process of task encroachment
not only strengthens the force of machine substitution,
but it wears down those helpful complementarities too.
Bring these three myths together
and I think we can capture a glimpse of that troubling future.
Machines continue to become more capable,
encroaching ever deeper on tasks performed by human beings,
strengthening the force of machine substitution,
weakening the force of machine complementarity.
And at some point, that balance falls in favor of machines
rather than human beings.
This is the path we're currently on.
I say "path" deliberately, because I don't think we're there yet,
but it is hard to avoid the conclusion that this is our direction of travel.
That's the troubling part.
Let me say now why I think actually this is a good problem to have.
For most of human history, one economic problem has dominated:
how to make the economic pie large enough for everyone to live on.
Go back to the turn of the first century AD,
and if you took the global economic pie
and divided it up into equal slices for everyone in the world,
everyone would get a few hundred dollars.
Almost everyone lived on or around the poverty line.
And if you roll forward a thousand years,
roughly the same is true.
But in the last few hundred years, economic growth has taken off.
Those economic pies have exploded in size.
Global GDP per head,
the value of those individual slices of the pie today,
they're about 10,150 dollars.
If economic growth continues at two percent,
our children will be twice as rich as us.
If it continues at a more measly one percent,
our grandchildren will be twice as rich as us.
By and large, we've solved that traditional economic problem.
Now, technological unemployment, if it does happen,
in a strange way will be a symptom of that success,
will have solved one problem -- how to make the pie bigger --
but replaced it with another --
how to make sure that everyone gets a slice.
As other economists have noted, solving this problem won't be easy.
Today, for most people,
their job is their seat at the economic dinner table,
and in a world with less work or even without work,
it won't be clear how they get their slice.
There's a great deal of discussion, for instance,
about various forms of universal basic income
as one possible approach,
and there's trials underway
in the United States and in Finland and in Kenya.
And this is the collective challenge that's right in front of us,
to figure out how this material prosperity generated by our economic system
can be enjoyed by everyone
in a world in which our traditional mechanism
for slicing up the pie,
the work that people do,
withers away and perhaps disappears.
Solving this problem is going to require us to think in very different ways.
There's going to be a lot of disagreement about what ought to be done,
but it's important to remember that this is a far better problem to have
than the one that haunted our ancestors for centuries:
how to make that pie big enough in the first place.
Thank you very much.
(Applause)