Even if our loved ones have assured us that they'll be busy at work, even if they told us they hated us for going travelling in the first place, even if they left us last June or died twelve years ago, it is impossible not to experience a shiver of a sense that they may have come along anyway, just to surprise us and make us feel special.

It was as if a vital evolutionary advantage had been bestowed centuries ago on those members of the species who lived in a state of concern about what was to happen next. These ancestors might have failed to savour their experiences appropriately, but they had at least survived and shaped the character of their descendants, while their more focused siblings, at one with the moment and with the place where they stood, had met violent ends on the horns of unforeseen bison.

We are inundated with advice on where to travel to, but we hear little of why and how we should go, even though the art of travel seems naturally to sustain a number of questions neither so simple nor so trivial, and whose study might in modest ways contribute to an understanding of what the Greek philosophers beautifully termed eudaimonia, or ‘human flourishing’.