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Daniel Finkelstein

ByDaniel Finkelstein, Daniel Finkelstein

Opinion

Extremism comes in crowds

A shul barred Goldstone from his grandson’s barmitzvah — just the kind of sad decision that big groups make

April 22, 2010 11:30
2 min read

Have you ever heard of group polarisation? Here's how it works. A small group of you are sitting together watching the televised Prime Ministerial debate. One of you thinks Gordon Brown is doing well and you're not convinced by the other two. Soon you are laughing at every Nick Clegg and David Cameron answer. The one member of the group who hates Brown begins to see his merits. By the end of the evening, you've all gone Browntastic.

Then you see the poll. Much of the rest of the world thinks Clegg won. And there's a group at work who watched and gave the gold medal to Cameron.

In his book Going to Extremes, Cass Sunstein explains what has just happened. When groups get together, they feel out each others' views and then, together, they work themselves into a bit of a lather. The dissidents are embarrassed into silence, those in the majority keep confirming the rightness of each others' position. The group as a whole becomes more extreme.

Sunstein has tested this thesis. He took judges in the United States and divided them into those judging panels with exclusively Democratic appointees and those with exclusively Republican appointees. He showed how their decisions were very different from each other and more extreme than mixed panels.