So much for right versus left. Mr Brooks also finds that extremists of both sides are happier than moderates. Some 35% of those who call themselves “extremely liberal” say they are very happy, against only 22% of ordinary liberals. For conservatives, the gap is smaller: 48% to 43%. Extremists are happy, Mr Brooks reckons, because they are certain they are right. Alas, this often leads them to conclude that the other side is not merely wrong, but evil. Some two-thirds of America's far left and half of the far right say they dislike not only the other side's ideas, but also the people who hold them.

'Free Tibet' flags made in China

Police in southern China have discovered a factory manufacturing Free Tibet flags, media reports say.

The factory in Guangdong had been completing overseas orders for the flag of the Tibetan government-in-exile.

Workers said they thought they were just making colourful flags and did not realise their meaning.

But then some of them saw TV images of protesters holding the emblem and they alerted the authorities, according to Hong Kong's Ming Pao newspaper.

Tibet independence

The factory owner reportedly told police the emblems had been ordered from outside China, and he did not know that they stood for an independent Tibet.

Israel's ambassador to the United Nations on Thursday called former President Jimmy Carter "a bigot" for meeting with the leader of the militant Hamas movement in Syria.

The email was titled "Email of the year" and reads as follows: