Sunday, June 25, 2017

How language transformed humanity

00:12
Each of you possesses the most powerful, dangerous and subversive trait that natural selection has ever devised. It's a piece of neural audio technology for rewiring other people's minds. I'm talking about your language, of course, because it allows you to implant a thought from your mind directly into someone else's mind, and they can attempt to do the same to you, without either of you having to perform surgery. Instead, when you speak, you're actually using a form of telemetry not so different from the remote control device for your television. It's just that, whereas that device relies on pulses of infrared light, your language relies on pulses, discrete pulses, of sound.


00:56
And just as you use the remote control device to alter the internal settings of your television to suit your mood, you use your language to alter the settings inside someone else's brain to suit your interests. Languages are genes talking, getting things that they want. And just imagine the sense of wonder in a baby when it first discovers that, merely by uttering a sound, it can get objects to move across a room as if by magic, and maybe even into its mouth.


01:26
Now language's subversive power has been recognized throughout the ages in censorship, in books you can't read, phrases you can't use and words you can't say. In fact, the Tower of Babel story in the Bible is a fable and warning about the power of language. According to that story, early humans developed the conceit that, by using their language to work together, they could build a tower that would take them all the way to heaven. Now God, angered at this attempt to usurp his power, destroyed the tower, and then to ensure that it would never be rebuilt, he scattered the people by giving them different languages -- confused them by giving them different languages. And this leads to the wonderful irony that our languages exist to prevent us from communicating. Even today, we know that there are words we cannot use, phrases we cannot say, because if we do so, we might be accosted, jailed, or even killed. And all of this from a puff of air emanating from our mouths.


02:30
Now all this fuss about a single one of our traits tells us there's something worth explaining. And that is how and why did this remarkable trait evolve, and why did it evolve only in our species? Now it's a little bit of a surprise that to get an answer to that question, we have to go to tool use in the chimpanzees. Now these chimpanzees are using tools, and we take that as a sign of their intelligence. But if they really were intelligent, why would they use a stick to extract termites from the ground rather than a shovel? And if they really were intelligent, why would they crack open nuts with a rock? Why wouldn't they just go to a shop and buy a bag of nuts that somebody else had already cracked open for them? Why not? I mean, that's what we do.


03:16
Now the reason the chimpanzees don't do that is that they lack what psychologists and anthropologists call social learning. They seem to lack the ability to learn from others by copying or imitating or simply watching. As a result, they can't improve on others' ideas or learn from others' mistakes -- benefit from others' wisdom. And so they just do the same thing over and over and over again. In fact, we could go away for a million years and come back and these chimpanzees would be doing the same thing with the same sticks for the termites and the same rocks to crack open the nuts.


03:55
Now this may sound arrogant, or even full of hubris. How do we know this? Because this is exactly what our ancestors, the Homo erectus, did. These upright apes evolved on the African savanna about two million years ago, and they made these splendid hand axes that fit wonderfully into your hands. But if we look at the fossil record, we see that they made the same hand axe over and over and over again for one million years. You can follow it through the fossil record. Now if we make some guesses about how long Homo erectus lived, what their generation time was, that's about 40,000 generations of parents to offspring, and other individuals watching, in which that hand axe didn't change. It's not even clear that our very close genetic relatives, the Neanderthals, had social learning. Sure enough, their tools were more complicated than those of Homo erectus, but they too showed very little change over the 300,000 years or so that those species, the Neanderthals, lived in Eurasia.


04:56
Okay, so what this tells us is that, contrary to the old adage, "monkey see, monkey do," the surprise really is that all of the other animals really cannot do that -- at least not very much. And even this picture has the suspicious taint of being rigged about it -- something from a Barnum & Bailey circus.


05:18
But by comparison, we can learn. We can learn by watching other people and copying or imitating what they can do. We can then choose, from among a range of options, the best one. We can benefit from others' ideas. We can build on their wisdom. And as a result, our ideas do accumulate, and our technology progresses. And this cumulative cultural adaptation, as anthropologists call this accumulation of ideas, is responsible for everything around you in your bustling and teeming everyday lives. I mean the world has changed out of all proportion to what we would recognize even 1,000 or 2,000 years ago. And all of this because of cumulative cultural adaptation. The chairs you're sitting in, the lights in this auditorium, my microphone, the iPads and iPods that you carry around with you -- all are a result of cumulative cultural adaptation.


06:17
Now to many commentators, cumulative cultural adaptation, or social learning, is job done, end of story. Our species can make stuff, therefore we prospered in a way that no other species has. In fact, we can even make the "stuff of life" -- as I just said, all the stuff around us. But in fact, it turns out that some time around 200,000 years ago, when our species first arose and acquired social learning, that this was really the beginning of our story, not the end of our story. Because our acquisition of social learning would create a social and evolutionary dilemma, the resolution of which, it's fair to say, would determine not only the future course of our psychology, but the future course of the entire world. And most importantly for this, it'll tell us why we have language.


07:12
And the reason that dilemma arose is, it turns out, that social learning is visual theft. If I can learn by watching you, I can steal your best ideas, and I can benefit from your efforts, without having to put in the time and energy that you did into developing them. If I can watch which lure you use to catch a fish, or I can watch how you flake your hand axe to make it better, or if I follow you secretly to your mushroom patch, I can benefit from your knowledge and wisdom and skills, and maybe even catch that fish before you do. Social learning really is visual theft. And in any species that acquired it, it would behoove you to hide your best ideas, lest somebody steal them from you.


07:59
And so some time around 200,000 years ago, our species confronted this crisis. And we really had only two options for dealing with the conflicts that visual theft would bring. One of those options was that we could have retreated into small family groups. Because then the benefits of our ideas and knowledge would flow just to our relatives. Had we chosen this option, sometime around 200,000 years ago, we would probably still be living like the Neanderthals were when we first entered Europe 40,000 years ago. And this is because in small groups there are fewer ideas, there are fewer innovations. And small groups are more prone to accidents and bad luck. So if we'd chosen that path, our evolutionary path would have led into the forest -- and been a short one indeed.


08:50
The other option we could choose was to develop the systems of communication that would allow us to share ideas and to cooperate amongst others. Choosing this option would mean that a vastly greater fund of accumulated knowledge and wisdom would become available to any one individual than would ever arise from within an individual family or an individual person on their own. Well, we chose the second option, and language is the result.


09:21
Language evolved to solve the crisis of visual theft. Language is a piece of social technology for enhancing the benefits of cooperation -- for reaching agreements, for striking deals and for coordinating our activities. And you can see that, in a developing society that was beginning to acquire language, not having language would be a like a bird without wings. Just as wings open up this sphere of air for birds to exploit, language opened up the sphere of cooperation for humans to exploit. And we take this utterly for granted, because we're a species that is so at home with language,


10:00
but you have to realize that even the simplest acts of exchange that we engage in are utterly dependent upon language. And to see why, consider two scenarios from early in our evolution. Let's imagine that you are really good at making arrowheads, but you're hopeless at making the wooden shafts with the flight feathers attached. Two other people you know are very good at making the wooden shafts, but they're hopeless at making the arrowheads. So what you do is -- one of those people has not really acquired language yet. And let's pretend the other one is good at language skills.


10:35
So what you do one day is you take a pile of arrowheads, and you walk up to the one that can't speak very well, and you put the arrowheads down in front of him, hoping that he'll get the idea that you want to trade your arrowheads for finished arrows. But he looks at the pile of arrowheads, thinks they're a gift, picks them up, smiles and walks off. Now you pursue this guy, gesticulating. A scuffle ensues and you get stabbed with one of your own arrowheads. Okay, now replay this scene now, and you're approaching the one who has language. You put down your arrowheads and say, "I'd like to trade these arrowheads for finished arrows. I'll split you 50/50." The other one says, "Fine. Looks good to me. We'll do that." Now the job is done.


11:15
Once we have language, we can put our ideas together and cooperate to have a prosperity that we couldn't have before we acquired it. And this is why our species has prospered around the world while the rest of the animals sit behind bars in zoos, languishing. That's why we build space shuttles and cathedrals while the rest of the world sticks sticks into the ground to extract termites. All right, if this view of language and its value in solving the crisis of visual theft is true, any species that acquires it should show an explosion of creativity and prosperity. And this is exactly what the archeological record shows.


11:56
If you look at our ancestors, the Neanderthals and the Homo erectus, our immediate ancestors, they're confined to small regions of the world. But when our species arose about 200,000 years ago, sometime after that we quickly walked out of Africa and spread around the entire world, occupying nearly every habitat on Earth. Now whereas other species are confined to places that their genes adapt them to, with social learning and language, we could transform the environment to suit our needs. And so we prospered in a way that no other animal has. Language really is the most potent trait that has ever evolved. It is the most valuable trait we have for converting new lands and resources into more people and their genes that natural selection has ever devised.


12:50
Language really is the voice of our genes. Now having evolved language, though, we did something peculiar, even bizarre. As we spread out around the world, we developed thousands of different languages. Currently, there are about seven or 8,000 different languages spoken on Earth. Now you might say, well, this is just natural. As we diverge, our languages are naturally going to diverge. But the real puzzle and irony is that the greatest density of different languages on Earth is found where people are most tightly packed together.


13:24
If we go to the island of Papua New Guinea, we can find about 800 to 1,000 distinct human languages, different human languages, spoken on that island alone. There are places on that island where you can encounter a new language every two or three miles. Now, incredible as this sounds, I once met a Papuan man, and I asked him if this could possibly be true. And he said to me, "Oh no. They're far closer together than that." And it's true; there are places on that island where you can encounter a new language in under a mile. And this is also true of some remote oceanic islands.


14:00
And so it seems that we use our language, not just to cooperate, but to draw rings around our cooperative groups and to establish identities, and perhaps to protect our knowledge and wisdom and skills from eavesdropping from outside. And we know this because when we study different language groups and associate them with their cultures, we see that different languages slow the flow of ideas between groups. They slow the flow of technologies. And they even slow the flow of genes. Now I can't speak for you, but it seems to be the case that we don't have sex with people we can't talk to. (Laughter) Now we have to counter that, though, against the evidence we've heard that we might have had some rather distasteful genetic dalliances with the Neanderthals and the Denisovans.


14:51
(Laughter)


14:53
Okay, this tendency we have, this seemingly natural tendency we have, towards isolation, towards keeping to ourselves, crashes head first into our modern world. This remarkable image is not a map of the world. In fact, it's a map of Facebook friendship links. And when you plot those friendship links by their latitude and longitude, it literally draws a map of the world. Our modern world is communicating with itself and with each other more than it has at any time in its past. And that communication, that connectivity around the world, that globalization now raises a burden. Because these different languages impose a barrier, as we've just seen, to the transfer of goods and ideas and technologies and wisdom. And they impose a barrier to cooperation.


15:45
And nowhere do we see that more clearly than in the European Union, whose 27 member countries speak 23 official languages. The European Union is now spending over one billion euros annually translating among their 23 official languages. That's something on the order of 1.45 billion U.S. dollars on translation costs alone. Now think of the absurdity of this situation. If 27 individuals from those 27 member states sat around table, speaking their 23 languages, some very simple mathematics will tell you that you need an army of 253 translators to anticipate all the pairwise possibilities. The European Union employs a permanent staff of about 2,500 translators. And in 2007 alone -- and I'm sure there are more recent figures -- something on the order of 1.3 million pages were translated into English alone.


16:46
And so if language really is the solution to the crisis of visual theft, if language really is the conduit of our cooperation, the technology that our species derived to promote the free flow and exchange of ideas, in our modern world, we confront a question. And that question is whether in this modern, globalized world we can really afford to have all these different languages.


17:14
To put it this way, nature knows no other circumstance in which functionally equivalent traits coexist. One of them always drives the other extinct. And we see this in the inexorable march towards standardization. There are lots and lots of ways of measuring things -- weighing them and measuring their length -- but the metric system is winning. There are lots and lots of ways of measuring time, but a really bizarre base 60 system known as hours and minutes and seconds is nearly universal around the world. There are many, many ways of imprinting CDs or DVDs, but those are all being standardized as well. And you can probably think of many, many more in your own everyday lives.


17:59
And so our modern world now is confronting us with a dilemma. And it's the dilemma that this Chinese man faces, who's language is spoken by more people in the world than any other single language, and yet he is sitting at his blackboard, converting Chinese phrases into English language phrases. And what this does is it raises the possibility to us that in a world in which we want to promote cooperation and exchange, and in a world that might be dependent more than ever before on cooperation to maintain and enhance our levels of prosperity, his actions suggest to us it might be inevitable that we have to confront the idea that our destiny is to be one world with one language.


18:48
Thank you.


18:50
(Applause)


18:58
Matt Ridley: Mark, one question. Svante found that the FOXP2 gene, which seems to be associated with language, was also shared in the same form in Neanderthals as us. Do we have any idea how we could have defeated Neanderthals if they also had language?


19:15
Mark Pagel: This is a very good question. So many of you will be familiar with the idea that there's this gene called FOXP2 that seems to be implicated in some ways in the fine motor control that's associated with language. The reason why I don't believe that tells us that the Neanderthals had language is -- here's a simple analogy: Ferraris are cars that have engines. My car has an engine, but it's not a Ferrari. Now the simple answer then is that genes alone don't, all by themselves, determine the outcome of very complicated things like language. What we know about this FOXP2 and Neanderthals is that they may have had fine motor control of their mouths -- who knows. But that doesn't tell us they necessarily had language.


19:56
MR: Thank you very much indeed.


19:58
(Applause)

(Source: https://www.ted.com/talks/mark_pagel_how_language_transformed_humanity/transcript )

Evolutionary Language Search Lands at Babel


by Dr. Elizabeth Mitchell  on January 5, 2013

Search for evolutionary explanation of languages falls short and lands at Babel.

Apes around the world can understand each other, so why do intellectually superior humans have around 7,000 distinct languages? queries evolutionary biologist Mark Pagel.  Pagel, a professor at the University of Reading in the UK, heads a team searching for an evolutionary explanation for our many languages. “Why,” he asks, “would humans evolve a system of communication that prevents them with communicating with other members of the same species?”1
From an evolutionary point of view, any trait that advanced humanity beyond its supposed ape-like ancestry must have offered a survival advantage. So, in a New Scientist editorial called “War of words: The language paradox explained,” Pagel writes:
You could take a gorilla or chimpanzee from its troop and plop it down anywhere these species are found, and it would know how to communicate. You could repeat this with donkeys, crickets or goldfish and get the same outcome.
This highlights an intriguing paradox at the heart of human communication. If language evolved to allow us to exchange information, how come most people cannot understand what most other people are saying?
In other words, if humans evolved language in order to communicate with each other, then why did language continue to evolve in a way that interfered with such communication? Pagel finds the biblical explanation best. Of course, he does not consider the Bible to be a reliable historical source and therefore tries to apply its principles to his model of social evolution. He writes:
This perennial question [why there are so many languages] was famously addressed in the Old Testament story of the Tower of Babel, which tells of how humans developed the conceit that they could use their shared language to cooperate in the building of a tower that would take them to heaven. God, angered at this attempt to usurp his power, destroyed the tower and to ensure it would not be rebuilt he scattered the people and confused them by giving them different languages. The myth leads to the amusing irony that our separate languages exist to prevent us from communicating. The surprise is that this might not be far from the truth. . . .
For the myriad biological species in the tropics, there are advantages to being different because it allows each to adapt to its own ecological niche. But humans all occupy the same niche, and splitting into distinct cultural and linguistic groups actually brings disadvantages, such as slowing the movement of ideas, technologies and people. It also makes societies more vulnerable to risks and plain bad luck. So why not have one large group with a shared language?
Pagel adds, “We should expect new languages to arise as people spread out and occupy new lands because as soon as groups become isolated from one another their languages begin to drift apart and adapt to local needs.” But then he notes that the opposite appears to have happened, writing, “But the real puzzle is that the greatest diversity of human societies and languages arises not where people are most spread out [like the Arctic], but where they are most closely packed together [like Papua New Guinea, where neighboring tribes typically speak distinctly different languages].”
Research recently published in Science compares linguistic data in an attempt to trace the origin of Indo-European languages. The authors suggest that these languages emerged from the region of Anatolia (Asia Minor).2
IT IS THE VERY FACT THAT HUMAN LANGUAGES FLY IN THE FACE OF EVOLUTIONARY IDEAS THAT PROMPTS PAGEL TO CALL OUR LINGUISTIC HISTORY AN EVOLUTIONARY “PARADOX.”
Nothing in the new research or in Pagel’s editorial supports the notion that humans had to evolve from intellectually inferior animals and a trail of primitive hominids. In fact, it is the very fact that human languages fly in the face of evolutionary ideas that prompts Pagel to call our linguistic history an evolutionary “paradox.” Though he not only considers the biblical account of the tower of Babel a myth but errs in his re-telling of it, he at least recognizes the actual effect God’s linguistic judgment had.
Pagel misrepresents the purpose for which God confused the languages as well as the actual events. The historical account of the tower of Babel is recorded in Genesis 11. Following the global Flood, God commanded people to spread out and repopulate the earth. The bulk of humanity refused and instead consolidated power in one area and built the tower, but not to gain access to heaven. Nothing in the Bible says that was their goal or that God got angry at their attempted forced entry. Genesis 11:4 records, “And they said, ‘Come, let us build ourselves a city, and a tower whose top is in the heavens; let us make a name for ourselves, lest we be scattered abroad over the face of the whole earth.’” Thus the tower was part of the unifying efforts of the people as they combined their efforts to build a single civilization in one place in defiance of God’s instruction.
God scattered the people by confusing their languages because their unified rebellion gave them much power to defy God’s plans. The Bible says nothing about God destroying the tower. Genesis 11:6–9 records,
And the Lord said, “Indeed the people are one and they all have one language, and this is what they begin to do; now nothing that they propose to do will be withheld from them.
Come, let Us go down and there confuse their language, that they may not understand one another’s speech.”
So the Lord scattered them abroad from there over the face of all the earth, and they ceased building the city.
Therefore its name is called Babel, because there the Lord confused the language of all the earth; and from there the Lord scattered them abroad over the face of all the earth.
As intelligent people dispersed from the tower of Babel and their groups became isolated, the “movement of ideas and technology” was slowed, and humanity’s power and ability to perpetrate ungodliness and evil was limited. God provides another clue as to His plans for mankind and the reason it was necessary to limit man’s potential by linguistically interfering with unity and cooperation: Acts 17:26–27 records the Apostle Paul saying, “And He has made from one blood every nation of men to dwell on all the face of the earth, and has determined their preappointed times and the boundaries of their dwellings, so that they should seek the Lord, in the hope that they might grope for Him and find Him, though He is not far from each one of us.” Though missionaries and Bible translators all over the world must work hard to make God’s Word and the good news of the gospel available to people in their own languages, Paul’s message lets us know that the lack of a language barrier would have allowed sinful humanity to make this sin-cursed world even more evil and resistant to the gospel message than it is.
The biblical history of the dispersion from the tower of Babel also indicates that diversity of language emerged from the area of “a plain in the land of Shinar” away from which many groups of people traveled some time after the global Flood. Noah’s Ark had come to rest in “the mountains of Ararat,” so geographically the region would have been in the region we know as the Middle East. Thus, not only Pagel’s linguistic analysis but also the geographical conclusions from the latest linguistic research (suggesting the Indo-European languages diversified from the region of Asia Minor) are essentially consistent with the historical facts supplied to us through God’s Word.


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