among all forms of mistake,

prophecy is the most gratuitous.

The person that we would all acknowledge

as her 20th-century counterpart, Yogi Berra, agreed.

He said, "It's tough to make predictions,

especially about the future."

I'm going to ignore their cautions

and make one very specific forecast.

In the world that we are creating very quickly,

we're going to see more and more things

that look like science fiction,

and fewer and fewer things that look like jobs.

Our cars are very quickly going to start driving themselves,

which means we're going to need fewer truck drivers.

We're going to hook Siri up to Watson

and use that to automate a lot of the work

that's currently done by customer service reps

and troubleshooters and diagnosers,

and we're already taking R2D2,

painting him orange, and putting him to work

carrying shelves around warehouses,

which means we need a lot fewer people

to be walking up and down those aisles.

Now, for about 200 years,

people have been saying exactly what I'm telling you --

the age of technological unemployment is at hand —

starting with the Luddites smashing looms in Britain

just about two centuries ago,

and they have been wrong.

Our economies in the developed world have coasted along

on something pretty close to full employment.

Which brings up a critical question:

Why is this time different, if it really is?

The reason it's different is that, just in the past few years,

our machines have started demonstrating skills

they have never, ever had before:

understanding, speaking, hearing, seeing,

answering, writing, and they're still acquiring new skills.

For example, mobile humanoid robots

are still incredibly primitive,

but the research arm of the Defense Department

just launched a competition

to have them do things like this,

and if the track record is any guide,

this competition is going to be successful.

So when I look around, I think the day is not too far off at all

when we're going to have androids

doing a lot of the work that we are doing right now.

And we're creating a world where there is going to be

more and more technology and fewer and fewer jobs.

It's a world that Erik Brynjolfsson and I are calling

"the new machine age."

The thing to keep in mind is that

this is absolutely great news.

This is the best economic news on the planet these days.

Not that there's a lot of competition, right?

This is the best economic news we have these days

for two main reasons.

The first is, technological progress is what allows us

to continue this amazing recent run that we're on

where output goes up over time,

while at the same time, prices go down,

and volume and quality just continue to explode.

Now, some people look at this and talk about

shallow materialism,

but that's absolutely the wrong way to look at it.

This is abundance, which is exactly

what we want our economic system to provide.

The second reason that the new machine age

is such great news is that, once the androids

start doing jobs, we don't have to do them anymore,

and we get freed up from drudgery and toil.

Now, when I talk about this with my friends

in Cambridge and Silicon Valley, they say,

"Fantastic. No more drudgery, no more toil.

This gives us the chance to imagine

an entirely different kind of society,

a society where the creators and the discoverers

and the performers and the innovators

come together with their patrons and their financiers

to talk about issues, entertain, enlighten,

provoke each other."

It's a society really, that looks a lot like the TED Conference.

And there's actually a huge amount of truth here.

We are seeing an amazing flourishing taking place.

In a world where it is just about as easy

to generate an object as it is to print a document,

we have amazing new possibilities.

The people who used to be craftsmen and hobbyists

are now makers, and they're responsible

for massive amounts of innovation.

And artists who were formerly constrained

can now do things that were never, ever possible

for them before.

So this is a time of great flourishing,

and the more I look around, the more convinced I become

that this quote, from the physicist Freeman Dyson,

is not hyperbolic at all.

This is just a plain statement of the facts.

We are in the middle of an astonishing period.

["Technology is a gift of God. After the gift of life it is perhaps the greatest of God's gifts. It is the mother of civilizations, of arts and of sciences." — Freeman Dyson]

Which brings up another great question:

What could possibly go wrong in this new machine age?

Right? Great, hang up, flourish, go home.

We're going to face two really thorny sets of challenges

as we head deeper into the future that we're creating.

The first are economic, and they're really nicely summarized

in an apocryphal story about a back-and-forth

between Henry Ford II and Walter Reuther,

who was the head of the auto workers union.

They were touring one of the new modern factories,

and Ford playfully turns to Reuther and says,

"Hey Walter, how are you going to get these robots

to pay union dues?"

And Reuther shoots back, "Hey Henry,

how are you going to get them to buy cars?"

Reuther's problem in that anecdote

is that it is tough to offer your labor to an economy

that's full of machines,

and we see this very clearly in the statistics.

If you look over the past couple decades

at the returns to capital -- in other words, corporate profits --

we see them going up,

and we see that they're now at an all-time high.

If we look at the returns to labor, in other words

total wages paid out in the economy,

we see them at an all-time low

and heading very quickly in the opposite direction.

So this is clearly bad news for Reuther.

It looks like it might be great news for Ford,

but it's actually not. If you want to sell

huge volumes of somewhat expensive goods to people,

you really want a large, stable, prosperous middle class.

We have had one of those in America

for just about the entire postwar period.

But the middle class is clearly under huge threat right now.

We all know a lot of the statistics,

but just to repeat one of them,

median income in America has actually gone down

over the past 15 years,

and we're in danger of getting trapped

in some vicious cycle where inequality and polarization

continue to go up over time.

The societal challenges that come along

with that kind of inequality deserve some attention.

There are a set of societal challenges

that I'm actually not that worried about,

and they're captured by images like this.

This is not the kind of societal problem

that I am concerned about.

There is no shortage of dystopian visions

about what happens when our machines become self-aware,

and they decide to rise up and coordinate attacks against us.

I'm going to start worrying about those

the day my computer becomes aware of my printer.

(Laughter) (Applause)

So this is not the set of challenges we really need to worry about.

To tell you the kinds of societal challenges

that are going to come up in the new machine age,

I want to tell a story about two stereotypical American workers.

And to make them really stereotypical,

let's make them both white guys.

And the first one is a college-educated

professional, creative type, manager,

engineer, doctor, lawyer, that kind of worker.

We're going to call him "Ted."

He's at the top of the American middle class.

His counterpart is not college-educated

and works as a laborer, works as a clerk,

does low-level white collar or blue collar work in the economy.

We're going to call that guy "Bill."

And if you go back about 50 years,

Bill and Ted were leading remarkably similar lives.