“The term ‘the Establishment,’ as it is now popularly used, was introduced into the common language and speech of England on September 23, 1955.” That is, according to the Oxford English Dictionary. The linguistic arbiter cites as its locus classicus a Spectator article written by the political journalist Henry Fairlie. The above quotation, however, was not weaned from the OED, but from Fairlie himself, writing in the New Yorker in 1968. The etymological memoir is simply entitled, “Evolution of a Term”.
Fairlie sets the scene: