A year ago, the Danes reached into their groaning cracker barrel and pulled out ‘hygge’ as their own solution to the world’s problems. That was bad enough, but now it is the Swedes’ turn, offering up ‘lagom’ as the shrine before which all must now grovel in untimely worship. Yet what are both of these but replays of two hoary classical injunctions?

‘Hygge’ ultimately stems from the philosopher Epicurus (d.