In a new series starting today on Radio 4, To Go or not to Go, the travel writer Sara Wheeler (whose most recent book is her acclaimed biography of Jan Morris) “asks whether travel today is an over-indulgence or if it can still offer us unmissable adventures and insights”. In the first episode, she considers “whether having unique encounters with people from other cultures gives her any more insight than she can gain through life experience and ageing or whether true perspective can only be gleaned by actually being there”.