The Royal Society has a beauty pageant moment

Scientists are good at science. That does not qualify them as advisors on world affairs.

“So, Miss Royal Society, if there were three things you could change about the world, what would they be?”
OK, so there isn’t a Miss Royal Society (it’s proving hard enough to get the Society to elect female fellows in respectable numbers). But a report issued by the Society today reads like the answers often heard from toothsome beauties in swimsuits.
The report is on issues relating to global population and consumption. The Society’s first request is that “the international community must bring the 1.3 billion people living on less than $1.25 per day out of absolute poverty, and reduce the inequality that persists in the world today.” The Royal Society doesn’t want any children to go to bed hungry, you see.
Second, they’d like people to stop being so greedy: “The most developed and the emerging economies must stabilise and then reduce material consumption levels.”
Third, they want people in developing countries to stop having so many babies.
If it really were a beauty pageant, we’d all gape in awe at the gaffe, then share the video with our friends. We could share the 5.7MB PDF of the report, but really, that’s a lot to read when the top three recommendations are, respectively, banal, naive and reminiscent of an edict issued on behalf of the British Empire in the latter part of the 18th century.
The case study given for the family planning problem is Niger, where the report tells us “over a quarter of women older than 40 have given birth to 10 or more children.”  The report explains that Niger’s high fertility is not, for the most part, due to poverty, education or access to family planning. The biggest problem, the report says, is the double-barrelled shotgun of Niger’s polygamous culture, and – wait for it – its “large desired family size”.
Yes, they actually want all these children! In fact, the report goes on to admit that married women in Niger want an average of 8.8 children. So let’s put that first statistic another way: the majority of women in Niger have, or will have, roughly the number of children they’d like to have. That’s not a problem, surely?
Well, apparently it is. The Royal Society’s issue is that, from a global perspective, these women really aren’t team players: they are producing more than their fair share of humans.
In science circles, there’s an old joke about theoretical physicists helping out a troubled dairy farmer. It’s not actually that funny, so I’ll cut straight to the punchline where the physicists say, “first let’s assume the cow is a sphere.”  The point is that science is often ill-equipped for realities outside the lab. The Royal Society’s report is well-intentioned, and Sir John Sulston, the chair of the panel that produced it, is both an excellent scientist and by all accounts a deeply impressive human being. The problem is, scientists are good at science, and beauty pageant contestants are generally beautiful. From the evidence presented so far, these are not qualities that seem to qualify either group as advisors on world affairs.

A boy stands by his hut in a village near Maradi, a southern city in Niger. The country was a case study in the Royal Academy's report. Photograph: Getty Images

Michael Brooks holds a PhD in quantum physics. He writes a weekly science column for the New Statesman, and his most recent book is At the Edge of Uncertainty: 11 Discoveries Taking Science by Surprise.

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“A cursed project”: a short history of the Facebook “like” button

Mark Zuckerberg didn't like it, it used to be called the “awesome button”, and FriendFeed got there first. 

The "like" button is perhaps the simplest of the website's features, but it's also come to define it. Companies vie for your thumbs up. Articles online contain little blue portals which send your likes back to Facebook. The action of "liking" something is seen to have such power that in 2010, a class action lawsuit was filed against Facebook claiming teenagers should not be able to "like" ads without parental consent. 

And today, Facebook begins trials of six new emoji reaction buttons which join the like button at the bottom of posts, multiplying its potential meanings by seven: 

All this makes it a little surprising that Facebook CEO Mark Zuckerberg spent a good portion of the noughties giving the like button a thumbs down. According to Andrew Bosworth, Vice President of Advertising and Pages at Facebook (and known simply as "Boz") it took nearly two years to get the concept of an approval button for posts off the ground.

In a fascinating Quora thread, Boz explains that the idea of a star, plus sign or thumbs up for posts first came up in July 2007, three years after "TheFacebook" launched in 2004. Throughout these initial discussions, the proposed bursts of positivity was referred to as an "awesome button". A few months later someone floated the word "like" as a replacement, but, according to Boz, it received a "lukewarm" reception. 

The team who ran the site's News Feed feature were keen, as it would help rank posts based on popularity. The ad team, meanwhile, thought "likes" could improve clickthrough rates on advertisements. But in November 2007, the engineering team presented the new feature to Mark Zuckerberg, and, according to Boz, the final review "[didn't] go well". The CEO was concerned about overshadowing the Facebook "share" and comment features - perhaps people would just "awesome" something, rather than re-posting the content or writing a message. He also wanted more clarification on whether others would see your feedback or not. After this meeting, Boz writes, "Feature development as originally envisioned basically stops". 

The teams who wanted the button forged ahead with slightly different features. If you were an early user, you might remember that News Feed items and ads collected positive or negative feedback from you, but this wasn't then displayed to other users. This feature was "ineffective", Boz writes, and was eventually shut down. 

So when Jonathan Piles, Jaren Morgenstern and designer Soleio took on the like button again in December 2008, many were skeptical: this was a "cursed project", and would never make it past a sceptical Zuckerberg. Their secret weapon, however was data scientist Itamar Rosenn, who provided data to show that a like button wouldn't reduce the number of comments on a post. - that, in fact, it increased the number of comments, as likes would boost a popular post up through the News Feed. Zuckerberg's fears that a lower-impact feedback style would discourage higher value interactions like reposting or commenting were shown to be unfounded. 

A bigger problem was that FriendFeed, a social aggregator site which shut down in April 2015, launched a "like" feature in October 2007, a fact which yielded some uncomfortable media coverage when Facebook's "like" finally launched. Yet Boz claims that no one at Facebook clocked onto FriendFeed's new feature: "As far as I can tell from my email archives, nobody at FB noticed. =/". 

Finally, on 9 February 2009, "like" launched with a blogpost, "I like this", from project manager Leah Pearlman who was there for the first "awesome button" discussions back in 2007. Her description of the button's purpose is a little curious, because it frames the feature as a kind of review: 

This is similar to how you might rate a restaurant on a reviews site. If you go to the restaurant and have a great time, you may want to rate it 5 stars. But if you had a particularly delicious dish there and want to rave about it, you can write a review detailing what you liked about the restaurant. We think of the new "Like" feature to be the stars, and the comments to be the review.

Yet as we all know, there's no room for negative reviews on Facebook - there is no dislike button, and there likely never will be. Even in the preliminary announcements about the new emoji reactions feature, Zuckerberg has repeatedly made clear that "dislike" is not a Facebook-worthy emotion: "We didn’t want to just build a Dislike button because we don’t want to turn Facebook into a forum where people are voting up or down on people’s posts. That doesn’t seem like the kind of community we want to create."

Thanks to the new buttons, you can be angry, excited, or in love with other people's content, but the one thing you can't do is disapprove of its existence. Championing positivity is all well and good, but Zuckerberg's love of the "like" has more to do with his users' psychology than it does a desire to make the world a happier place. Negative feedback drives users away, and thumbs-down discourages posting. A "dislike" button could slow the never-ending stream of News Feed content down to a trickle - and that, after all, is Facebook's worst nightmare. 

Barbara Speed is a technology and digital culture writer at the New Statesman and a staff writer at CityMetric.