Worlds within worlds: Outpost (2007) by the artist Anne Hardy. Photograph: Anne Hardy, courtesy of Maureen Paley, London
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Terry Pratchett, science and story telling

The best of all possible worlds.

Terry Pratchett’s first Discworld novel was published in 1983. As a wartime child in the 1940s I was already puzzling over an image of a domed world poised on the backs of three elephants that stood on a monstrous turtle. This discworld had a small temple on top of it, and the clawed feet of the turtle rested on the coils of a huge serpent, which also stretched to encircle the world, with the point of its tail in its mouth. It was reproduced in my favourite book, Asgard and the Gods, a scholarly German work on Norse myths, which my mother had used at Cambridge.

This image, and this book, provoked my earliest thinking about the nature of belief and its relation to storytelling. Where on earth did the idea of the turtle and the elephants come from? Did people really believe in them? These questions were related to the kind of embarrassed pain with which I contemplated the stories of origins I was expected to believe in, the Bible with its heaven and hell, the tale of judgement to come.

Pratchett’s new book, The Science of Discworld IV, co-written with the mathematician Ian Stewart and the biologist Jack Cohen, discusses ideas about origins and endings, cosmology and astrobiology, entropy and genetics. The idea of storytelling is not just an embroidered way of including a tale of the discussion of the “Roundworld” taking place on the Discworld. Human beings are defined as pan narrans, the storytelling ape, who exists in a dimension known as the “narrativium”. We look for causes because we think in linear sequences of words. We look for origins because we arrange our world into narrative strings with beginning, middle and end. Stewart, Cohen and Pratchett set out to puzzle us and make us think differently.

Central to their approach is the distinction made by the physicist and sciencefiction author Gregory Benford between human-centred thinking and universecentred thinking. Human-centred thinking comes naturally to human beings. “In this world-view, rain exists in order to make crops grow and to provide fresh water for us to drink. The sun is there because it warms our bodies.” From human-centred thinking comes the idea of a ruler of the universe, as well as the idea that the earth and the creatures, the sea and the oil and the forests are somehow there for our benefit. Universe-centred thinking, on the other hand, sees human beings as “just one tiny feature of a vast cosmos, most of which does not function on a human scale or take any notice of what we want”. The universecentred thinker must have what Keats called “negative capability” – the capacity to be in uncertainties, mysteries, doubts, without any irritable reaching after fact and reason. This is hard and invigorating.

The writers discuss creation myths – including a number of myths about cosmic turtles and scientific ideas about origins, including the Big Bang. They discuss the evolution of ideas about evolution, recent thoughts about the relation of RNA to DNA and the idea of the curvature of space. They also consider neural networks and decision theory, and the strong and weak anthropic principles – ideas about how the physical universe is uniquely suited to the existence of human beings.

Pratchett and co also explore the psychology of belief and disbelief. They describe one way of coming to conclusions – the brain taking in new evidence, and fitting it to the knowledge and beliefs it already holds. This is what they call “System 1”, and it includes scientific thinkers as well as people with inherited religious beliefs. There are, they say, scientists who “know” that DNA is the most important part of the system, physicists who “know” that the world is moving towards entropy. “System 2”, on the other hand, is steadily analytical and sceptical – “trying, not always successfully, to ignore inbuilt prejudices”. Karl Popper’s system of “critical rationalism” held that a theory could be considered scientific if, and only if, it was capable of falsification. Stewart and Cohen claim that “scientists actively try to disprove the things they would like to be true”. They use the example of a believer in UFOs who sees disbelief in UFOs as another form of belief. “Zero belief in UFOs”, they point out, is not the same as 100 per cent belief in the non-existence of UFOs. “Zero belief is an absence of belief, not an opposed form of belief.” What they aspire towards and desire is “a disbelief system”. This is exhilarating.

I remember being on a platform where various poets and writers discussed the ways in which the arts could figure the world of the scientist. That blunt sceptic Lewis Wolpert, sitting in the audience, rose to inform the assembled artists that we would not understand any of his work were we to find ourselves in his laboratory. Some of us were indignant but I believe he was right. People like me can read what is written by those scientists who try to tell us about neurons, genes, the shape of the brain, the shape of space and time. We can respond to those descriptions but we are responding to stories, at second hand.

One of the most pleasing things about Pratchett, Stewart and Cohen’s book is the way the authors demonstrate that we don’t understand even what we think we understand. I realised, reading their account of the complex relations between RNA and DNA, that I had been guilty of holding a belief. I was very excited in the late 1970s by ideas about the “selfish gene”, and particularly by the points made by John Maynard Smith about the immutable nature of the inherited and eternal germ cell. Now the New Scientist is full of articles about newly discovered “orphan DNA”. Stewart and Cohen write:

Darwin’s tree of life, a beautiful idea that derives from a sketch in The Origin of Species and has become iconic, gets very scrambled around in its roots because of a process called horizontal gene transfer. Bacteria, archaea and viruses swap genes with gay abandon, and they can also insert them into the genomes of higher animals, or cut them out. So a gene in one type of bacterium might have come from another type of bacterium altogether, or from an archaean, or even from an animal or a plant.

The story I believed in has to be modified and rethought. When I read this, I think in a human way with a series of images, in the grammar of a story. I should not be able to recognise any gene, let alone think intelligently about it. Stewart and Cohen are very good at illustrating our incapacity to understand. They do so with images and stories. My favourite is the one they tell to make us think about the difference between complicated chemistry and the “organised complexity” of the ribosome. It is a story about caramel.

Every cook knows that heating sugar with fats, two fairly simple chemical substances, produces caramel . . .  Caramel is enormously complicated on a chemical level. It includes innumerable different molecules, each of which has thousands of atoms. The molecular structure of caramel is far more complicated than most of the molecules you’re using to read this page.

But the complexity of caramel, or other complicated polymers, doesn’t produce organised complexity, as ribosomes do. Wolpert would rightly tell me that I still don’t know anything about the ribosomes. But I am at least able now to think about the problem. And the juxtaposition of caramel and brain is unforgettable. There are delights like this on most pages of this book.

In a chapter entitled “Where did that come from?” we are invited to reflect on how we can’t think about things like the origin of an oak tree, or a child, or even a thunderstorm. They make the reader imagine thinking about clouds, the constituents of the atmosphere, static electricity, physics and physical chemistry. Most of us, they say, “will not have come across one or more phrases such as ‘saturated solution’ or ‘particle carries a tiny electrical charge’. These phrases are themselves simplifications of concepts with many more associations, and more intellectual depth, than anyone can be expected to generate for themselves.” Human beings tend to retreat from uncertainty or difficulty into belief stories, like the American Republican candidate who opposed any regulation of the markets on the grounds that this was “interfering with God’s plan for the American economy”.

Pratchett, Stewart and Cohen use their method of complicating descriptions and explanations to examine several problems with things I have trouble with believing myself, because they feel to me like human stories that tidy up our relation to the universe – the Big Bang, the existence of dark matter, entropy and the “anthropic principle”. They discuss conflicting views of the expanding universe and the steady state and cast doubt on the existence of dark matter. They are not propounding or supporting any particular theory of the shape and origins of the universe, but are rather considering evidence that complicates the explanations we have become used to. They are good at picking out the operations of what they call our “very parochial” minds, which use ideas of space and time that evolved with us. “Our view of the universe may be just as parochial as the world-bearing animals of ancient cultures were. Future scientists may view both the Big Bang and four elephants riding on a turtle as conceptual errors of a very similar kind.”

In Richard Feynman’s The Character of Physical Law, they find a tendency evident in “too many physicists” to consider physical reality to be all of reality. Feynman, they write, states that “the same kind of atoms appear to be in living creatures as in non-living creatures [sic]; frogs are made of the same ‘goup’ as rocks only in different arrangements”. Things in the biological world are the results of the behaviour of physical and chemical phenomena with no “extra something.” Stewart and Cohen agree about the “no extra something” but think that a bleak view of the world of particles and elements misses out the complexity of living things, and the things they make and use and learn from.

Entropy may not be our destiny – they see Feynman rather as Pratchett sees his undifferentiated auditors, who want to tidy everything up into packets of particles. Life, say Stewart and Cohen, has “lifted itself up into a story”. That is a metaphor – and an attractive one. It feels right, and should therefore be regarded with the necessary doubt and suspicion. They also take a mocking run at the idea of “fine-tuning”, the idea that the world has evolved as the only possible world in which humans could exist – just the right amount of carbon and water, and so on.

This “anthropic principle”, in both its strong and its weak forms, has always horrified me because it is so clearly a function of the human mind thinking in a humancentred way. Isn’t it amazing, say the Discworld scientists, that our legs are just long enough to reach the ground? Isn’t it amazing that there was a hole exactly the right size to contain that puddle? And what about a sulphur-centred form of thought?

There was one chapter I found hard to understand – on the curvature of space, round worlds and disc worlds. This was where I wished the book had illustrations – I read pages about the doughnut-shaped torus, and then had the sense to consult Wikipedia, where I could see what was being discussed. And I also needed to see the geometry of the wonderful Escher image of angels and demons.

I have become rather sad about surviving into the anthropocene age of human history, where everything is controlled and constructed by and for what the King of Brobdingnag called “the most pernicious race of little odious vermin that Nature ever suffered to crawl upon the surface of the earth”. But, paradoxically, both Pratchett’s storytelling and the resolutely universecentred perspective of the scientists make me happier to be human. I look forward to the next volume.

“The Science of Discworld IV: Judgement Day” by Terry Pratchett, Ian Stewart and Jack Cohen is published by Ebury Press (£18.99). A S Byatt’s most recent book is “Ragnarok: the End of the Gods” (Canongate, £7.99

Both A S Byatt and Terry Pratchett will be appearing at How the Light Gets In, the festival of philosophy and music in Hay on Wye. For more details, visit:  www.howthelightgetsin.org

This article first appeared in the 12 April 2013 issue of the New Statesman, Centenary Special Issue

© MARK PETERSON/REDUX/EYEVINE
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Goodbye to the Confederate flag

After the shootings in Charleston, the Republican right showed it was finally ready to reject the old symbols of the Confederacy.

On 27 June, an African-American activist named Bree Newsome woke up before dawn, put on her climbing equipment and scaled a 30-foot flagpole on the lawn of State House in Columbia, South Carolina. She then removed the Confederate battle flag that flew from it. “We can’t wait any longer,” she explained later in an online statement. “It’s time for a new chapter where we are sincere about dismantling white supremacy.”

After she was led away in handcuffs, the flag was raised again.

Newsome’s protest reflected a growing impatience within America’s black community and anger about liberal inaction. Political rallies by the Democratic presidential contenders Hillary Clinton and Bernie Sanders have been disrupted by the Black Lives Matter campaign against violence committed on young African Americans and the cultural and legal biases that justify it. While promoting his book on race in the US, the writer Ta-Nehisi Coates argued that, to African Americans, the battle flag represents a lingering attempt “to bury the fact that half this country thought it was a good idea to raise an empire rooted in slavery”.

Yet, on this matter, to everyone’s surprise, the black civil rights movement and many southern Republicans have proved to be of one mind. On 9 July the House of Representatives in South Carolina voted to lower the battle flag for good. It stood, representatives said, for racism. It had to go.

The context of this agreement was a painful one. Ten days before Newsome’s act, a 21-year-old white man named Dylann Roof shot and killed nine black worshippers at the Emanuel African Methodist Episcopal Church in Charleston, South Carolina. According to his room-mate, he wanted to start a race war. The TV screens showed a photo of him holding a gun in one hand and a Confederate battle flag in the other.

If the demands for redress made by civil rights groups didn’t come as a surprise, conservative acquiescence did. The Republican Party had built a solid base in the South by courting white voters who cherished the memory of the Confederacy. Yet the party’s presidential hopefuls from both the North and the South – including Jeb Bush, Lindsey Graham, Scott Walker and George Pataki – said that the battle flag ought to be lowered. The most striking intervention was made by the governor of South Carolina, Nikki Haley, who denounced the use of the Confederate flag and signed the bill removing it. Haley is now tipped to figure on the list of potential vice-presidential nominees.

The volte-face of the US right is in part a result of the horror of the Charleston shootings. Yet it also occurs in the context of major shifts within American society. There are still many conservatives who will defend Confederate heritage as a matter of southern pride but the culture wars are changing as the US becomes increasingly European in outlook. This is taking place across the country. It just happens to be more pronounced in the South because no other region has fought so violently and so long to resist the liberal tide.

The story of the battle flag is the story of the South. The first official Confederate flag used in the civil war of 1861-65 caused confusion during fighting – through the haze of gun smoke, its design of 13 stars and red and white bars was hard to distinguish from the Stars and Stripes. An alternative blue cross was rejected for being too sectarian; the racist Confederacy was anxious not to offend its Jewish citizens. So the cross became a diagonal X. This flag was never officially adopted by the Confederate army. In the years after the war its use was infrequent.

There was little need to visualise southern difference in a flag. It was self-evident in the physical signs of racial segregation: separate schools, pools and drinking fountains; black people confined to the back of the bus. Political displays of the battle flag of Dixie (the historical nickname for the states that seceded from the Union) only really resurfaced when that racial order was challenged by northern liberals. In 1948, the Democrats – then the party overwhelmingly in control of the South – split over modest calls for civil rights. The conservatives who refused to support that year’s presidential ticket, the “Dixiecrats”, triggered a rev­ival of flag-waving across the region.

The old battle flag suddenly appeared on private lawns, on cars and at political rallies. Supposedly ancient cultural traditions were invented overnight. For instance, the 1948 student handbook of the University of Mississippi confessed: “Many Ole Miss customs are fairly new; they lack only the savouring which time brings . . . Ole Miss has adopted the Confederate flag as a symbol of the Mississippi spirit. Each football game finds the scarlet flag frantically waving to the rhythm of the Rebel band.”

I can confirm that this “tradition” was still going as recently as in 2005. That year, I attended an American football game at Ole Miss and was surprised when the band played “Dixie” at the end. White boys and white girls stood up and belted out the folk song of the Confederacy, while black students filed out.

In 1958, South Carolina made it a crime to desecrate the battle flag. Three years later, on the 100th anniversary of the outbreak of the civil war, it was hoisted above its Capitol building in Columbia. That day, there was a struggle in the US Congress to keep federal funding going for segregated schools.

So clear is the link between the postwar white resistance to civil rights and the battle flag that many see it as the symbolic equivalent of the N-word. Jack Hunter, the editor of the conservative website Rare Politics, says: “Some people insist that it’s not about racism, not about slavery, not about segregation. But it’s about all those things.” Hunter grew up in Charleston and used to skateboard in the car park of the church that Dylann Roof attacked. When he was a young journalist, he appeared on local radio as a rabidly right-wing masked character called “the Southern Avenger”. His past was exposed in 2013 while he was working for Rand Paul, a Republican presidential candidate, and Hunter stepped down from his position. He publicly renounced his youthful association with racial conservatism. He now eschews any romanticism about the Confederate cause and its demand for states’ rights. “States’ rights to do what?” he asks: the right to discriminate against African Americans? He is glad that the State House flag is gone. He ascribes its longevity to ignorance, which was corrected by Roof’s rampage: “It was the first time that [southern Republicans] were able to see a different perspective on this symbol.”

Not everyone agrees. Richard Hines – a former South Carolina legislator, Reagan campaign state co-chair and senior activist with the Sons of Confederate Veterans – insists that the flag is “an enduring symbol of the southern fighting man”. Indeed, a poll in July found that 57 per cent of Americans think it stands for southern heritage, rather than racism. Yet that heritage has a political dimension. “Southern people are proud of who they are and there is a leftist assault to destroy the best part of America,” Hines says. “The Trotskyite elite in control of the establishment wants to root out the southern tradition” – a tradition of religious devotion, chivalry and military honour. It is possible to cast the battle flag as a pawn in a much larger cultural conflict.

In 2000, civil rights activists lobbied hard to get the battle flag removed from the top of the South Carolina Capitol and succeeded in having it shrunk in size and relocated to the grounds of State House. The issue came up in that year’s Republican presidential primaries – an unusually poisonous contest between George W Bush and John McCain. Supporters of Bush put out a false story that McCain had fathered an interracial child out of wedlock. McCain added to his woes by opining that the battle flag was “a symbol of racism and slavery”. An organisation called Keep It Flying flooded the state with 250,000 letters attacking him and he lost the crucial competition here to Bush.

The battle flag has retained a strong emotional power for a long time. This makes the Republican establishment’s abandonment of the flag all the more surprising. Then again, those who run the South are probably the people most likely to grasp how much the region has changed in just a decade.

***

In 2010 I took a trip through North Carolina. The landscape told a story. Dotted along the roadside were abandoned black buildings, the old tobacco sheds. The decline of the rural economy had rendered them obsolete. Over the fields that would once have been full of farmers were freshly tarmacked roads, stretching out to nowhere. My guide explained that these were supposed to be cul-de-sacs for new houses. North Carolina was going through a property boom. But who was going to buy all those homes, I asked? The answer: damn Yankees.

Demography is destiny. This once agri­cultural region developed fast from the 1960s onwards by keeping union membership, taxes and regulation as low as possible. Yet capitalism proved disastrous for southern conservatism. Northerners flooded in, seeking work or retirement and bringing their own values. The forecast is that North Carolina’s Research Triangle – the South’s Silicon Valley – will grow by 700,000 jobs and 1.2 million people in two decades.

White migration was accompanied by an influx of Spanish speakers as the service sector flourished. Between 2000 and 2010, the white share of the population of North Carolina fell from 70 to 65 per cent. The black proportion remained at roughly 21 per cent. The Latino proportion, however, jumped from 4.7 per cent to 8.4 per cent. Today, the proportion of people who are non-white and over 60 is about a third. But it’s approaching nearly half for those under 18. As a result, politics in the South is no longer biracial: a contest between white and black. It is increasingly multiracial and uncoupled from the region’s complex past.

The impact of these changes is reflected in voting patterns. In 2000, the South was still overwhelmingly Republican in presidential contests. Even the Democratic nominee, Al Gore, a southerner, lost his home state of Tennessee. But in 2008 and 2012, Barack Obama took those states with the fastest-changing demographics: Florida and Virginia. He won North Carolina in 2008 and lost it in 2012 – but by less than 100,000 votes. It is true that the Republicans won back control in the 2014 midterm elections, with the result that the Deep South now sends few Democrats to Congress; but the region’s political masters are not quite as traditional-minded as they once were.

The Republican relationship with the Confederate past is complex. As the party of Abraham Lincoln and the Union, the GOPs’ southern support was historically small. But in the 1960s the national Democratic Party embraced civil rights and alienated its once loyal southern following; the Republicans took the opportunity to steal some conservative white voters.

The growing southern Republican vote had a class component. Its success in local and congressional races was built more on winning over middle-class moderates than on appealing to the working-class racists who filled the ranks of the Ku Klux Klan. The southern Republican Party did enthusiastically embrace the Confederate battle flag in many quarters. But some office-holders did so only with ambiguity, while large sections of the party never identified with it at all. The period of Republican ascendancy in the South was, in reality, linked with a softening of the area’s racial politics.

Two of the Republicans’ current southern stars are Indian Americans: Bobby Jindal, the governor of Louisiana, and Nikki Haley, the anti-flag governor of South Carolina. There are just two black people in the US Senate and one of them is a Republican, the Tea Party-backed senator for South Carolina, Tim Scott. Marco Rubio, the Floridian senator and presidential candidate, is Cuban American, and the former Florida governor Jeb Bush is married to a Mexican-born woman and speaks fluent Spanish. Bush has tried to push a more moderate line on immigration, in deference to how the GOP will struggle to win the White House if it appeals only to angry white voters. The Kentucky libertarian senator Rand Paul, Jack Hunter’s former boss, has called for legal reforms to correct the trend of keeping far more black than white people in prison. And he is not the only Republican to have been moved by recent race riots sparked by police violence.

***

Violence on the streets of Ferguson, Missouri, and Baltimore, Maryland, confirmed that there still is a culture war in the US. Yet its character has changed. In the past, civil disturbances were typically leapt upon by conservative politicians as evidence of social decline. The 1992 LA riots were blamed on single parenthood and rap lyrics. In contrast, conservative leaders today are far more likely to acknowledge the problems of white racism. There is no place in their ranks for the likes of Dylann Roof. White supremacists are tiny in number.

Jack Hunter claims: “The KKK is like 12 guys in a telephone booth. Liberal groups will use their threat for fundraising but it doesn’t exist. It hasn’t properly since the 1960s.” Roof’s actions say more about gun control, mental illness and the angst of the young than they do about popular, largely liberal views on race, as polling shows.

We can see a similar liberal shift in other areas of the historic culture war. In May 2015 Gallup released the results of a “moral acceptability” survey charting changes in national attitude across all age groups, from 2001 to 2015. Approval of gay relationships jumped from 40 to 63 per cent; having a baby out of wedlock from 45 to 61 per cent; sex between unmarried men and women from 53 to 68 per cent; doctor-assisted suicide from 49 to 56 per cent; even polygamy went from 7 to 16 per cent. Abortion remained narrowly disapproved of: support for access has only crept up from 42 to 45 per cent. This is probably a result of an unusual concentration of political and religious opposition and because it involves a potential life-or-death decision. But the general trend is that young people just don’t care as much about what consenting adults get up to.

Why? It might be because old forms of identity are dying. One way of measuring that is religious affiliation. From 2007 to 2014, according to Pew Research, the proportion of Americans describing themselves as Christian fell from 78 to 71 per cent. Today, only a quarter of the population is evangelical and 21 per cent Catholic, down despite high immigration. Then there is the decline in civic or communal activity. Since 2012, the organisers of Nascar, the stock-car races, have not published attendance figures at their tracks, probably because they have fallen so sharply. The decline of this most macho and working class of sports parallels the fall in conservative forms of collective identity such as southern traditionalism.

The old culture war was, like the racial politics of the old South, binary. In the 1950s, around the same time as the South invented its tradition of flying the battle flag in colleges, the US constructed an ideal of the “normal” nuclear family unit: straight, white, patriarchal, religious. On the other side was the “abnormal”: gay, black, feminist, atheist, and the rest. The surest way to get elected in the US between 1952 and 2004 was to associate yourself with the economic needs and cultural prejudices of the majority. The approach was once summed up by a Richard Nixon strategist thus: split the country in two and the Republicans will take the larger half. But that is changing. The old normal is no longer the cultural standard but just one of many identities to choose from. The races are mixing. Women want to work more and have children later in life, possibly without marriage. Many religious people are having to rethink their theology when a child comes out as gay. And the enforcers of the old ways – the unions, churches or political parties – are far less attractive than the atomising internet.

***

Politicians are scrabbling to keep up with the diffusion of American identity. Democrats got lucky when they nominated Barack Obama and chose a presidential candidate who reflected the fractured era well: interracial, non-denominational Christian, and so on. In the 2012 presidential race the Republicans got burned when they tried to play the old culture war card on abortion. They won’t repeat that mistake. After the Supreme Court legalised gay marriage across the country in June, the right’s response was not as uniformly loud and outraged as it would have been in the past. Some protested, but serious presidential contenders such as Jeb Bush grasped the implications of the defeat. There is a cultural and political realignment going on and no one is sure where it will lead. It’s encouraging caution among the Republican top brass. It is time, they think, to abandon lost causes.

The death of southern traditionalism is part of the ebb and flow of cultural history. Identities flourish and die. As political fashions change, you find the typically American mix of triumph on one side and jeremiad on the other. Richard Hines stood vigil as the battle flag was lowered in Columbia and noted with disgust the presence of what he described as “bussed-in” activists. “They pulled out all these gay pride flags and started shouting, ‘USA, USA, USA!’ It reminded me of the Bolshevik Revolution.”

Hines reckons that more southerners will now fly the flag than ever before and says he has attended overflow rallies of ordinary folks who love their region. He may well be correct. The faithful will keep the old Confederate standard fluttering on their lawns – an act of secession from the 21st century. But in the public domain, the battle flag is on its way down and in its place will be raised the standard of the new America. The rainbow flag flutters high. For now.

Tim Stanley is a historian and a columnist for the Telegraph

This article first appeared in the 20 August 2015 issue of the New Statesman, Corbyn wars