U.K. Prime Minister David Cameron is a happy man right now. If he'd lost the union through sheer carelessness, which looked possible last week, history would have been unforgiving.
Had the Scots voted for independence, the poor man would have ranked for all time, beyond hope of redemption, below Neville Chamberlain in the gallery of Great British Failures. Congratulations, sir: Your reputation is damaged but retrievable.
It's too soon to say that the U.K. has cause to be happy.