But there was a period of friction, when “hello” was spreading beyond its summoning origins to become a general-purpose greeting, and not everyone was a fan. I was reminded of this when watching a scene in the BBC television series Call the Midwife, set in the late 1950s and early 1960s, where a younger midwife greets an older one with a cheerful “Hello!” “When I was in training,” sniffs the older character, “we were always taught to say ‘good morning,’ ‘good afternoon,’ or ‘good evening.’ ‘Hello’ would not have been permitted.” To the younger character, “hello” has firmly crossed the line into a phatic greeting. But to the older character, or perhaps more accurately to her instructors as a young nurse, “hello” still retains an impertinent whiff of summoning. Etiquette books as late as the 1940s were still advising against “hello,” but in the mouth of a character from the 1960s, being anti-hello is intended to make her look like a fussbudget, especially playing for an audience of the future who’s forgotten that anyone ever objected to “hello.”