This summary provides the high level information from the document in 3 sentences: The document discusses how social networks can influence behaviors both positively and negatively. It explains that factors like obesity, smoking, and depression can spread through social connections even between people who do not know each other personally. The document also discusses how the structure of social networks, such as having the right balance of new and old members, can impact outcomes in fields like Broadway musicals, scientific work, and business innovation.

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2. opInIons
council tax and other local issues will also
be strenuously resisted by local authori-
ties, most of which are now conservative
controlled, and which fear being burdened
with policy or spending commitments they
cannot afford. a weaker option would
make such referendums advisory, meaning
a successful petition would give supporters
the right to have their proposals debated at
a council meeting. But this isn’t exactly
giving power to the people.
the risk of talking big but delivering
small runs through all three of these
notions. more worrying for the tories, all
of them will alienate groups who should be
their natural allies: conservative mps and
councillors, judges and the police. this is
bold, but perhaps not quite in the way
cameron intended.
Robert Hazell is director of the constitution
unit at the school of social policy at UCL
Spamalot: successful musicals need the right mix of new and old teammates
networks
let’s all basic idea is simple: people join together in
groups with particular patterns of ties,
and these patterns then have important
duced hits. this variation in the “density”
of the ties allowed easy communication
and fostered greater creativity—new ideas
be friends effects on the way they behave.
the shape of these networks has sur-
from the outsiders meshed with the experi-
ence of the insiders. It didn’t matter if a
Our social ties can influence prising effects. take an unlikely example: musical was about cats or rollerskating
us for better—and for worse Broadway musicals. Brian Uzzi is a sociolo- trains, or who starred in it. Its success
gist at northwestern University in chi- came down to the structure of the network
Nicholas A Christakis & cago. he is also a big music hall fan. From binding its team together. the same thing
James Crabtree Cats to Spamalot, musicals have been big has been found to be true of scientific
business for decades, but investors have to invention or business innovation.
If friends of your friends begin to put on guess which shows will be a hit. Bye Bye Bring these two insights together—that
weight, you are likely to do the same—even Birdie, a profitable 1960 production star- information flowing along social networks
if you don’t know the people in question, ring Dick van Dyke, ran for 607 nights. can change behaviour, and that the shape
and even if they live hundreds of miles away. Bring Back Birdie, its 1981 sequel, was a of networks dramatically changes out-
obesity spreads like a fad; it is contagious. flop and closed after just four. comes—and there are some intriguing
this striking finding about how obesity Intrigued, Uzzi used network science to implications for policy. take health. We
spreads through social networks was the find out why. he put together a data set of know teenagers are more likely to smoke if
result of a 30-year study in massachus- the 321 musicals that launched on Broad- their friends smoke. But network science
setts, as nicholas a christakis and way between 1945 and 1989, paying partic- shows that they are more likely to smoke if
James h Fowler note in their new book, ular attention to whether the top team of friends of their friends (whom they don’t
Connected: The Surprising Power of Social producers, director, choreographers and know) smoke too. that said, the same can
Networks and How They Shape Our Lives writers had worked together before. after be true in reverse. here, governments
(harperpress). research shows that the crunching the statistics, he discovered could make budget savings. Let’s say the
same is true for smoking, and a range of something remarkable. teams who had nhs has £100, and wants to get ten peo-
other behaviours and attitudes like drink- never worked together, perhaps unsurpris- ple to quit smoking. If it spends £10 on
ing, depression, charitable giving, sexual ingly, fared poorly: their “weak” networks each, one at a time, perhaps one might
practices—even the decisions to marry, meant a lack of creative vision, and lots of stop. But imagine if it brought them
divorce, reproduce, or vote. duds. and at the other extreme, teams together in a new network. spend £100 on
Why is this important? Because from that had worked together successfully also this new group, and three might quit. or,
healthcare to climate change, governments tended to produce flops. sometimes, lack- spend £20 on the most connected person,
© alastair muir/rex features
today face a range of problems where they ing outside creative input, the team just or a person ideally located in a network
must persuade people to change their rehashed the same ideas that worked the with just the right density of ties to other
behaviour. But instead of relying on their last time; sometimes, lacking newcomers, people, and their decision to quit could
powers of persuasion, politicians should they “developed” their vision in daft ways. influence many others. outcomes improve,
consider taking a class in “network sci- either way, lightning rarely struck twice. for the same (or less) amount of money.
ence.” true, many claims for the power of But, in between, Uzzi found a point of David cameron’s tories have already
social networks are based on the hype sur- balance. Groups with exactly the right mix recognised part of this possibility, saying in
rounding websites like Facebook. But the of new and old participants reliably pro- their January 2010 “a healthier nation”
26 · prospect · march 2010

3. opInIons
green paper that “social norms are much introduce more parents to each other? as many as 10m people—report having not
more important than policymakers have elsewhere, we know that prisoners who one such person. a comparable figure for
traditionally assumed,” and announcing keep good social links to the outside world Britain would suggest that more than 2m
plans to try to create new, better norms find it easier to rehabilitate. so helping people are chronically alone.
(which, by definition, spread by social net- them keep in touch with people outside other research shows that being friend-
works). It’s a start, but other areas also should be a specific aim. even if some pris- less, or even just being part of a poor net-
seem ripe for a “network policy” approach. oners do use Facebook to misbehave, or to work, can exact a shocking toll: a teenage
If you can make musicals profitable by influence others, the decision by the justice girl whose friends do not get on with each
properly configuring the makeup of the secretary Jack straw in February to ban other is more likely to contemplate killing
team at the top, why would the same not some prisoners from using the site was herself than a second girl whose friends do
work for those who run schools, hospitals, probably a move in the wrong direction. like each other—regardless of how well she
even a government department? and if Why stop here? networked policies gets on with them, or who the friends are.
you can target anti-smoking measures to won’t solve the budget crisis, but they all of this suggests that new, network-
take account of people’s ability to influ- could help spark some new types of growth infused policies can help governments
ence others, there is no obvious reason why to help us out of recession. Business inno- unpick pressing problems on a tight bud-
the same network-centric techniques could vation is strongly influenced by the net- get. they might even help to bridge the
not be used to cut problem drinking, work structure of project teams and by divide between left and right. conserva-
tackle obesity, or foster workplace safety. communication between trading partners tives have traditionally concerned them-
more generally, if creating the right or scientists. policies could tap into this, selves with individual freedoms, while
type of social networks helps people get on just as they could try to set up new social social democrats have worried about the
in life, shouldn’t the state seek to help peo- norms for domestic energy conservation. wellbeing of social groups. network sci-
ple build such links? experts in “social perhaps the most exciting prospect is ence shows such a distinction to be at least
capital” theory have pushed this for years, ending social isolation. In 2009 Geoff mul- overly simplistic. shine a light on how indi-
to little practical effect. But they do have a gan, head of the Young Foundation think viduals assemble into groups and you’ll
point: governments should try to build new tank, launched a report arguing that Brit- also see how group membership affects
social systems that support social ties, and ain suffers from a quiet epidemic of loneli- individuals. taken together, this might not
design policies to take them into account. ness. he noted that 500,000 British pen- just improve policy and save money, but
how might this work? Families with sioners spend christmas alone. In the Us, help our politicians to be more persua-
young children, if they had better social researchers have asked people whom they sive—in the right sort of way.
links, could save money on childcare by like to spend free time with, or discuss per- Nicholas A Christakis is a professor of
relying on friends, or band together to sonal matters. It turns out that the average medicine, health policy and sociology at
hold schools to account, or even set up american has 4.3 such social contacts Harvard University and co-author of
their own. Why then should schools, or (including spouses, siblings and friends), “Connected” (HarperPress). James
sure start early years centres, not try to but over 4 per cent of adults—or perhaps Crabtree is Prospect’s managing editor
everyday philosophy
what’s so special about god?
By Nigel Warburton
E
veryone is equal before the law— actions as though they were universal it may be best to ignore conventional
almost. Britain’s first asian judge laws. and he’s surely right about this: morality. But that’s a risky strategy.
mota singh suggested in “What if everyone did that?” is the key could the inner voice that booms with
February that it could be discrimination question. What if all children were such conviction be a psychiatric
to prevent young sikhs wearing their allowed to carry ceremonial daggers? symptom rather than divine instruction?
ceremonial kirpans to school, despite a What if all employers were allowed to that was abraham’s anguish.
general ban on carrying daggers. the discriminate against gay candidates? perhaps because people think and
pope, limbering up for a tussle with some people will bite these bullets and feel so deeply about it, it is often
liberalism when he visits Britain in say “no problem.” that, at least, will get assumed that there is something special
september, exhorted catholic bishops the issues out in the open. about religion that should remain
to oppose “with missionary zeal” a But is there something special about immune to worldly considerations. Yet
tightening of equality laws that would religion that grants it privilege to trump religious affiliation guarantees nothing,
have required religious organisations to local law from time to time? søren as the parable of the predatory priests
stop discrimination against gay and Kierkegaard invoked the “teleological demonstrates. the moral: it’s probably
transgender candidates for jobs. suspension of the ethical”—that is, best not to do religion when you’re
enforced equality invariably curbs ditching ethics and even legality for the doing law. and an early heads up for the
liberties. But are there any sake of something higher. In special pope: it’s probably best not to do law
philosophical grounds for exceptions? circumstances—on those occasions when you’re doing religion either.
Immanuel Kant believed that one must when God asks you to sacrifice your Nigel Warburton is a senior lecturer in
scrutinise the principles governing one’s only son, for example (daggers again)— philosophy at the Open University
march 2010 · prospect · 27