INTERNATIONAL TRAVEL is sure to recover, not least because its benefits have long been appreciated. “Travel and change of place impart new vigour to the mind,” is a quote attributed to Seneca, a first-century Roman philosopher of the Stoic school. That is as true of the relaxation of a package trip to the seaside or a trek in the Himalayas as it is of visiting a close friend abroad or of a business leader seeking new opportunities. The goal of stoicism was to encourage virtue and maximise happiness. Travel often brings both virtue and happiness. It could be a bigger part of the bargain when the wheelie-bag era resumes.