From the category archives:

Science

The arithmetic of interstellar travel

by John Q on May 12, 2013

There’s been a lot of excitement about the discovery of two Earth-like[^1] planets, a mere 1200 light years away. Pretty soon, I guess, we’ll be thinking about sending colonists. So, I thought it might be worthwhile to a little bit of arithmetic on the exercise.

I’m going to assume (generously, I think) that the minimum size for a successful colony is 10 000. The only experience we have is the Apollo program, which transported 12 astronauts to the Moon (a distance of 1 light second) at a cost of $100 billion or so (current values). So, assuming linear scaling (again, very generously, given the need to accelerate to near lightspeed), that’s a cost of around $100 trillion per light-second for 10 000 people. 1200 light-years is around 30 billion light-seconds, so the total cost comes out roughly equal to the value of current world GDP accumulated over the life of the universe.

Even supposing that technological advances made travel possible over such distances possible, why would we bother. By hypothesis, that would require the ability to live in interstellar space for thousands of years. A civilisation with that ability would have no need of planets.

On behalf of my fellow Australians, I’m going to make a counter-offer. For a mere $10 trillion, we can find you an area of land larger than a typical European country, almost certainly more habitable than the new planets, and much closer. We’ll do all the work of supplying water and air, build 10 000 mansions for the inhabitants and guarantee a lifetime supply of food. I’m hoping for a spotters fee of 0.01 per cent.

On a related point, what should we be wishing for here? The fact that no-one has sent a detectable signal in our direction suggests that intelligent life forms similar to humans are very rare. If habitable planets are very rare, then this is unsurprising – interstellar distances preclude both travel and any kind of two-way communication. If on the other hand, the emergence of intelligent life is common, then the evidence suggests that its disappearance, through processes like nuclear war, must also be common.

[^1] Where Earth-like means somewhere between Venus-like and Mars-like.

Why Can’t We Say What Color Our Skin Is?

by John Holbo on December 8, 2012

Corey’s post about the more toxic stuff in Jefferson’s writings was interesting, wasn’t it?

This bit –

Are not the fine mixtures of red and white, the expressions of every passion by greater or less suffusions of colour in the one, preferable to that eternal monotony, which reigns in the countenances, that immoveable veil of black which covers all the emotions of the other race?

– reminded me of something else I read recently, in The Vision Revolution: How the Latest Research Overturns Everything We Thought We Knew About Human Vision, by Mark Changizi [Kindle version only $1.99. Good deal!]

The book manages to hit the popularized-but-substantive sweet spot pretty consistently. The chapter on skin color reports some of Changizi’s own research. He starts with a puzzle: why is it no one has a good name – a name they are satisfied with – for their own skin color? ‘White’ people aren’t white: tan, pink, salmon, off-white, peach? There are 11 ‘basic’ colors, per Berlin and Kay. None are good descriptors of anyone’s skin color. This result generalizes. ‘Black’ people aren’t any better at finding words for their own skin color they are satisfied with than ‘white’ people are.

Why would that be? A hypothesis. [click to continue…]

A recent study by the Washington University School of Medicine in St. Louis found that women using IUDs and other methods like under the skin implants or Depro-Provera injections were much less likely to have an accidental pregnancy than women using ordinary birth control pills, the trans-dermal patch, or the vaginal ring. (CT readers who are not up-to-the-minute on ladyissues may be interested to learn that the ring is a polymer, well, ring, which is inserted into the vagina, and then releases hormones over the course of three weeks. The birth control type is replaced after four weeks. Another version is used to treat the effects of menopause and has a different schedule.)

The women using the pill etc. were, in fact twenty times as likely to have an accidental pregnancy as the other group. “We know that IUDs and implants have very low failure rates — less than 1 percent,” says Brooke Winner, MD, a fourth-year resident at Barnes-Jewish Hospital and the study’s lead author. “But although IUDs are very effective and have been proven safe in women and adolescents, they only are chosen by 5.5 percent of women in the United States who use contraception.” In this case the study provided the various types of birth control at no cost. Worth noting, when the cost barrier was removed, the percentage of women choosing long-acting contraceptives went way up, to 75%.
[click to continue…]

Republican conservatism (complete rewrite)

by John Q on March 30, 2012

The first version of this was a trainwreck, as can be seen from the comments, so I’ve decided to rewrite it completely, trying to be as clear as possible about how I read Mooney and what I think myself.

Chris Mooney has a great talent for knowing just when to push the envelope. Back in 2005, when CT held a book event on The Republican War on Science, the idea that Republicans as a group were hostile to science and scientists was somewhere between controversial and unthinkable, as far as mainstream Sensible opinion was concerned. Now, it’s a truth universally recognised – even the professional Repub defense team doesn’t deny it, preferring the (demonstrably false) line that Dems are just as bad.

Now, with The Republican Brain Chris pushes the argument a step further with the question: why are Republicans  the way they are, and what, if anything, can be done about if? 

Before we start, I’ll observe that the set of “conservative Republicans” has changed over time, as have the specific set of policies associated with these terms and the general temperament that goes with this. On the first point, we’ve seen the disappearance of Eisenhower Republicans, the Southern realignment and the rise of the religious right, all of which have increased the concentration of dogmatic authoritarians in the Repub party. On the second, the emergence of environmentalism as a major political line of division is probably the most important development. The fact that Republicans/conservative are increasingly anti-science reflects both of these trends.

It’s also important to observe that Republican/conservative alignment can’t be explained simply in terms of class, geography and education though all these factors play a role. With a few exceptions (notably including blacks and scientists) a substantial portion of nearly every demographic group votes Republican and self-describes as conservative. So, explanations solely based on (for example) class interests, can’t explain voting behavior without a lot of (self?)deception, and that raises the question of why some people are more easily deceived.

Some people may regard themselves as Republican/conservative simply because they have adopted, without thinking too much about it, the political positions that are regarded as normal by their family, social circle and so on. Lots of people simply aren’t interested enough in either politics or science to devote a lot of thought to these issues. Typically, such people will hold a range of views that aren’t particularly consistent either internally or with any standard ideological line.

An obvious inference is that, if people could be given better information they would change their views. But, as Mooney shows, and has become steadily more evident thanks to the Internet, better educated and informed Republicans are more likely to hold crazy views consistently and less likely to change them in response to new information.

That leads to Mooney’s primary conclusion, that Republicans/conservatives don’t simply have different beliefs from liberals/Democrats (or, for that matter, leftists), or even different values. They have (bear in mind that this a statement about population averages) different psychological characteristics, summarised as high authoritarianism and low openness to ideas different from their own.

I find this pretty convincing. It seems to me that there is an authoritarian type of personality which, in the specific circumstances of the US right now, and for non-poor whites, produces a predisposition to Republican voting and “conservative” political attitudes. In particular this type of personality is (more) strongly associated with confirmation bias. That is, not only do they ignore evidence contrary to their initial position, they tend to reinforce their commitment as a result. The creation of an alternate universe in which this bias can be repeatedly amplified (Fox News, rightwing think tanks and so on) both reinforces this kind of thinking and encourages self-selection.

I don’t think there is the symmetry here that some of the commenters are suggesting. Looking at the standard examples of nuclear power and GM foods, it seems to me that, on the whole people on the left have been more open to evidence than in the corresponding cases on the right. In the case of nuclear power, it seemed for a while (say, from the mid-90s until a few years ago) as if the safety problems might be soluble at a reasonable cost in which case an expansion of nuclear power would be preferable to more coal-fired power stations. While the evidence pointed that way, opposition to nuclear power was muted. As it turned out, the problems couldn’t be solved, at least not at a reasonable cost, and Fukushima was the last straw.

In the case of GM foods, the evidence has mostly supported the position that the use of GM technology per se doesn’t create significant health risks, and AFAICT that has been fairly widely accepted on the left (Greenpeace is a notable exception, but I don’t think their position is representative of the left as a whole). That doesn’t rule out opposition to GM on ethical or aesthetic grounds, or opposition to the whole structure of the food industry – the whole point is that you can have preferences and beliefs without assuming that the facts will always be those most convenient to you.

Similar points may be made about “alternative” medicine, particularly opposition to vaccination. It’s primarily, though not exclusively (consider Michelle Bachmann), associated with liberals and leftists in the same way as creationism is primarily, though not exclusively, associated with evangelical conservatives. But, faced with scientific criticism, there hasn’t been anything like the political pushback and doubling down we’ve seen with creationism. The Huffington Post, which was a big outlet for anti-vaxers has started publishing one of their most vigorous critics, Seth Mnookin.

This brings us finally to the question that set off all the fireworks in the original post. To what extent are authoritarian personalities the product of environment, genes or some combination of the two. Again, it’s worth pointing out that, even if there is a genetic role in personality, there’s no such thing as a genetic predisposition to be a conservative/Republican. The content of these terms isn’t fixed, and the implications are very different depending on social circumstances. To take the most obvious case from comments: Republican policies and rhetoric appeal strongly to (US) white tribal/ethnic loyalty. So, US whites who respond well to in-group appeals are likely to vote Republican and call themselves conservatives. US blacks with similar predispositions obviously won’t vote Republican and are unlikely to call themselves conservatives.

To take another example from Mooney’s book, authoritarian attitudes in the US are typically associated with support for free-market/pro-business economic policies and virulent hostility to “socialism”. By contrast, in the former Soviet Bloc, the same attitudes are associated with support for the old order and positive feelings about “socialism” (I’m using the scare quotes to indicate that, in both cases, the term is something of a blank canvas, onto which all sorts of things can be projected). And indeed, in this context, the term “conservative” is commonly applied to hardline members of the surviving Communist parties.

Following up on a comment, this way of looking at things has a lot of similarities with Corey Robin, and The Reactionary Mind. The difference between Robin’s choice of Mind and Mooney’s choice of Brain is significant. As I argued when I looked at his book, I think Robin doesn’t take enough account of personality/temperament. While most soi-disant “conservatives” are authoritarian reactionaries, there is a genuinely conservative temperament which will tend to align with political conservatism in periods when the general tendency of politics is towards the left.

So, does the genetic part of the story matter. As (I think) Andrew Gelman has observed, in this context and many others, it’s just code for things we can’t change. As long as authoritarian personalities are stable over the adult lifetime of those concerned, it doesn’t matter much whether they are determined by genes, by toilet training (as in the caricature version of Freudian psychology I learned in my youth) or by some much more complex process. That said, I think the evidence that heredity (and therefore genes) plays at least some role in the determination of personality is pretty convincing.

The political implication, which has drawn some flak in the comments, but which I think is correct is that there is no point in political engagement with authoritarian conservatives. In a political environment where they are concentrated in one party,politics is going to be a matter the only strategy open to liberals is to outnumber and outvote them by peeling off as many peripheral groups (for example, those who deviate from the approved cultural identity in some way) as possible. Obviously, that’s an unpalatable conclusion in all sorts of ways, but I think it’s a valid one.

Pure, Unadulterated Good News

by Belle Waring on January 18, 2012

For the first time, India has gone a full year without a new polio case, the World Health Organization announced last week.

The last case, the only one in 2011, was of an 18-month-old girl in West Bengal State whose sudden paralysis was confirmed as polio on Jan. 13. There were 42 known cases in 2010.

Polio eradication officials described a year without new cases as a “game-changer” and a “milestone” because India was for decades one of the biggest centers of the disease.

All from the NYT article. I…can’t think of anything bad about this at all! Don’t help me.

Science and the “aim of philosophy”

by Chris Bertram on December 28, 2011

There’s a very interesting interview with Brian Leiter over at 3:AM Magazine. Read the whole thing, as they say. Interesting and entertaining though Brian’s thoughts are, I reacted somewhat negatively to his promotion of “realism” over “moralism” and to the somewhat dismissive (though sugar-coated) remarks he makes about Jerry Cohen. Jerry actually did have some “realist” things to say about society and politics, most notably in parts of _Self-Ownership, Freedom and Equality_ and in chapter 11 of _Karl Marx’s Theory of History_, but his work can speak for itself. More worrying, I think, is Brian’s apparent desire to abolish large parts of philosophy altogether when he write approvingly of:

bq. those who think the aim of philosophy should be to get as clear as possible about the way things really are, that is, about the actual causal structure of the natural and human world, how societies and economies work, what motivates politicians and ordinary people to do what they do ….

My question here is: why’s that an aim of _philosophy_ ? The people investigating the actual causal structure of the natural world are natural scientists, not philosophers; the people investigating the actual causal structure of the human world are social scientists, not philosophers.

Update: Brian assures me that he has no desire that the moralists be “purged” (my work was “abolished”). I’m happy to hear that, but it remains that he thinks that we moralists are pursuing an agenda that is other than he believes the aim of philosophy ought to be.

Too Depressing

by Belle Waring on December 8, 2011

I can’t believe the Obama administration caved on this.

For the first time ever, the Health and Human Services secretary publicly overruled the Food and Drug Administration, refusing Wednesday to allow emergency contraceptives to be sold over the counter, including to young teenagers. The decision avoided what could have been a bruising political battle over parental control and contraception during a presidential election season.

Thanks a lot, Kathleen Sebelius. God knows we wouldn’t want one of the groups least likely to use contraceptives properly to be able to easily get their hands on some Plan B. Up next: banning over-the-counter sales of paracetemol. Ha.

Belated Update: Reading below I do see that excerpt is misleading if you haven’t read the whole article; they didn’t take Plan B away from existing over-the-counter-sales, they just refused to extend it to full OTC status which would extend to those 17 and younger.

Drive and curiosity

by Eszter Hargittai on October 5, 2011

In light of today’s announcement of the Chemistry Nobel Prize winner, Dan Shechtman, I thought I’d make a shameless plug for my father’s latest book: Drive and Curiosity (AMZ, BN). Chapter 8 is all about Dan Shachtman. He is singled out for his “stubbornness” given that he did not let himself be talked out of his observation of a structure that all chemists and physicists believed impossible. Funny thing is, even Shechtman proved at one point in one of his college exams that it was impossible. Despite the journal rejections and other pushback that followed, he persevered and voila. By the way, it’s not a stretch for me to be making this connection to my father’s writing. The book source on the Nobel Prize page about Shechtman for further reading is a book co-authored by my father and my brother: Candid Science V. Conversations with Famous Scientists.

This photo (from the book) is of Dan Shechtman and Alan Mackay in my parents’ living room in 1995.

Collective Wisdom

by Henry Farrell on September 20, 2011

Via “Kevin Drum”:http://motherjones.com/kevin-drum/2011/09/wisdom-ignoring-crowds, a piece by Ed Yong “which argues”:http://blogs.discovermagazine.com/notrocketscience/2011/09/13/knowledgeable-individuals-protect-the-wisdom-of-crowds/

bq. Whatever it’s called, the principle is the same: a group of people can often arrive at more accurate answers and better decisions than individuals acting alone. There are many examples, from counting beans in a jar, to guessing the weight of an ox, to the Ask The Audience option in Who Wants to be a Millionaire? But all of these examples are somewhat artificial, because they involve decisions that are made in a social vacuum. Indeed, James Surowiecki, author of The Wisdom of Crowds, argued that wise crowds are ones where “people’s opinions aren’t determined by the opinions of those around them.” That rarely happens. From votes in elections, to votes on social media sites, people see what others around them are doing or intend to do. We actively seek out what others are saying, and we have a natural tendency to emulate successful and prominent individuals. So what happens to the wisdom of the crowd when the crowd talks to one another?

bq. … You can insert your own modern case study here, but perhaps this study ends up being less about the wisdom of the crowd than a testament to the value of expertise. Maybe the real trick to exploiting the wisdom of the crowd is to recognise the most knowledgeable individuals within it.

[click to continue…]

Ghostwriters of Science

by Henry Farrell on May 27, 2011

Via Randolph Fritz, a “very interesting article”:http://www.guardian.co.uk/science/2011/may/20/drug-companies-ghost-writing-journalism about how extensive the pharmaceuticals ghostwriting industry is:

bq. The planning companies are paid to implement high-impact publication strategies for specific drugs. They target the most influential academics to act as authors, draft the articles, and ensure that these include clearly-defined branding messages and appear in the most prestigious journals. … There are now at least 250 different companies engaged in the business of planning clinical publications for the pharmaceutical industry … Current Medical Directions, a medical communications company based in New York, promises to create “scientific content in support of our clients’ messages”. … n a flow-chart drawn up by Eric Crown, publications manager at Merck (the company that sold the controversial painkiller Vioxx), the determination of authorship appears as the fourth stage of the article preparation procedure. That is, only after company employees have presented clinical study data, discussed the findings, finalised “tactical plans” and identified where the article should be published. … “We’ve never done ghostwriting, per se, as I’d define it”, says John Romankiewicz, president of Scientific Therapeutics Information, the New Jersey firm that helped Merck promote Vioxx with a series of positive articles in medical journals. “We may have written a paper, but the people we work with have to have some input and approve it.”

I used to think that political scientists were lucky, in that no-one cared enough about what we had to say to try to suborn our reputations via dubious endorsements. And then I read about the “Gadaffi and political science scandal …”:http://www.guardian.co.uk/world/2011/mar/04/the-monitor-group-gadaffi-pr

I Predict the Gifted will Foresee the Punchline

by Kieran Healy on April 23, 2011

Here is a very old joke. A soldier is captured during a long-running war and thrown into the most stereotypical prison cell imaginable. Inside the cell is another solider. He has an enormous, disgusting-smelling beard and has clearly been there a long time. The young solider immediately sets about trying to escape. He is resourceful and possessed of great willpower. He bribes a guard with his emergency supply of cash. The guard gets him into a supply truck and he makes it to the prison garage, but is found during a routine vehicle search while exiting the compound. He is returned to his cell. His mangy companion says nothing about his departure or return. Undeterred, the young soldier works on the bars of the cell for weeks, filing them down with a shim made from a toothbrush. The whole time the old soldier looks on, silently. The young soldier finally breaks the bars, slips out the window and makes it to the outer wall, where he is spotted and recaptured. He is thrown back in the cell. He glowers at his grizzled companion, who still remains silent. Calming himself and mastering his despair, he tries yet again, this time digging a tunnel with the narrow end of a broken plastic coffee spoon. After about two years of work he succeeds in escaping under the wall and making it to the nearest town, only to be captured again at the train station. He is delivered, once again, back to his cell and its taciturn occupant. At the end of his wits, the young soldier finally confronts the old soldier, shouting, “Couldn’t you at least offer to help me with this?! I mean, I’ve come up with all these great plans—you could have joined me in executing them! What’s wrong with you?” The old soldier looks at him and says, “Oh I tried all these methods years ago—bribery, the bars, a tunnel, and a few others besides—none of them work.” The young soldier looks at him, incredulous, and screams “Well if you knew they didn’t work, WHY THE FUCK DIDN’T YOU TELL ME BEFORE I TRIED THEM, YOU BASTARD?!” The old soldier scratches his filthy beard and says, “Hey, who publishes negative results?

Present more Effectively. For Science.

by Kieran Healy on April 19, 2011

We've both said a lot of things you're going to regret.

Because of the day that’s in it, here’s a simple Aperture Science Keynote Theme. The theme requires you have Univers installed. For maximum effectiveness, the use of this theme is best accompanied by a well-prepared text, a clear speaking voice, and—for fielding questions—a functional Aperture Science military android. I’ll probably use the theme in class tomorrow (though the turret is still being shipped to me). Here are some samples:
[click to continue…]

Science Fiction: The Limit Case

by John Holbo on December 11, 2010

Thanks, Cosma, for posting the Haldane and Russell pieces. Let me now offer an elegant proof of Henry’s thesis – “The ancestry of modern SF lies as much in the 19th century ‘condition of England’ novel as it does in more obvious ancestors like Frankenstein” – with reference to the G.K. Chesterton novel, The Napoleon of Notting Hill, which Haldane mocks for its bad prophecy. (Haldane himself confidently predicts that, in the future, people will sensibly acknowledge the tonic, healthful effects of tobacco. Glass houses, stones.) Anyway, the neat thing about Napoleon is that it is imagines, from the point of view of 1904, what the world will look like, 80 years hence. Will 1984 be some sort of utopia, or some sort of dystopia, one asks?

Then the wise men grew like wild things, and swayed hither and thither, crying, “What can it be? What can it be? What will London be like a century hence? Is there anything we have not thought of? Houses upside down—more hygienic, perhaps? Men walking on hands—make feet flexible, don’t you know? Moon … motor-cars … no heads….” And so they swayed and wondered until they died and were buried nicely.

Then the people went and did what they liked. Let me no longer conceal the painful truth. The people had cheated the prophets of the twentieth century. When the curtain goes up on this story, eighty years after the present date, London is almost exactly like what it is now.

We arrive at the limit case of sf. We tend to assume science fiction is about portraying technological change – or potential technological differences from how things are now. But, logically, one of the possibilities is that things could be pretty much the same. Of course, this is rather silly because it turns every work of fiction into science fiction (because every work of fiction either imagines things to be different from how they are, scientifically, or more or less the same.) Which induces us to pluck the string of motive. What makes something sf is either its foregrounding of technological difference/change or its impulse to indulge the sociological imagination, more generally. Getting back to Chesterton, his world of 1984 is more changed than “almost exactly like what it is now” would suggest:

Very few words are needed to explain why London, a hundred years hence, will be very like it is now, or rather, since I must slip into a prophetic past, why London, when my story opens, was very like it was in those enviable days when I was still alive.

The reason can be stated in one sentence. The people had absolutely lost faith in revolutions. All revolutions are doctrinal—such as the French one, or the one that introduced Christianity. For it stands to common sense that you cannot upset all existing things, customs, and compromises, unless you believe in something outside them, something positive and divine. Now, England, during this century, lost all belief in this. It believed in a thing called Evolution. And it said, “All theoretic changes have ended in blood and ennui. If we change, we must change slowly and safely, as the animals do. Nature’s revolutions are the only successful ones. There has been no conservative reaction in favour of tails.”

And some things did change. Things that were not much thought of dropped out of sight. Things that had not often happened did not happen at all. Thus, for instance, the actual physical force ruling the country, the soldiers and police, grew smaller and smaller, and at last vanished almost to a point. The people combined could have swept the few policemen away in ten minutes: they did not, because they did not believe it would do them the least good. They had lost faith in revolutions.

Democracy was dead; for no one minded the governing class governing. England was now practically a despotism, but not an hereditary one. Some one in the official class was made King. No one cared how: no one cared who. He was merely an universal secretary.

In this manner it happened that everything in London was very quiet. That vague and somewhat depressed reliance upon things happening as they have always happened, which is with all Londoners a mood, had become an assumed condition. There was really no reason for any man doing anything but the thing he had done the day before.

Then: everything erupts in glorious medievalism!

Now, let’s run through it again. Logically, it should be allowable for any imaginative treatment of the future of science, or the possibilities of science (up to and including fairly flagrant impossibilities) to count as sf. But that means, potentially: things stay the same. But that’s a silly sort of sf. So we expand our definition to include works of sociological imagination, as it were. But now it’s a bit tail-wags-the-dog. The fact that Chesterton’s novel, framed as it is, is plainly sf, goes to show that sf is a subset of a broader set of works of sociologically imaginative fiction. In much sf, the machinery functions not as a fictional end but a means of getting the sociological ball rolling. Instead of deus ex machina, to end the thing, you have populus ex machina, to get it started. On the other hand, there are problems with doing it this way. But that’s why we have comment boxes.

The Mad Monckton

by Henry Farrell on October 29, 2010

“Gideon Rachman”:http://blogs.ft.com/rachmanblog/2010/10/a-night-at-the-oxford-union/

bq. The viscount is an interesting character. He once worked in the policy unit at Number Ten under Lady Thatcher and is now deputy leader of the anti-European UK Independence Party. More recently he has become famous as a vociferous climate-change sceptic and for fighting a Quixotic campaign to gain entrance into the House of Lords. I was seated opposite him at the pre-debate dinner, and initially I found his conversation rather unsettling: a blizzard of statistics and anecdotes on everything from climate to Europe, all delivered with supreme confidence and a slight gleam in the eye. I began to think that Viscount Monckton might be a formidable opponent during the debate. Then he told me that he has discovered a new drug that is a complete cure for two-thirds of known diseases – and that he expects it to go into clinical trials soon. I asked him whether his miracle cure was chiefly effective against viruses or bacterial diseases? “Both”, he said, “and prions”. At this point I felt a little more relaxed about the forthcoming debate.

A Conversation about Causation and Counterfactuals

by Kieran Healy on October 21, 2010

Philosophy TV hosts a conversation between Ned Hall and L.A. Paul on the counterfactual analysis of causation. It is, of course, must-see TV on any plausible account of necessity.

In the interests of full disclosure, something, something, something. I’ll think of it in a minute.