He accepted a boring job and became a member of 'the Establishment'.
His novels were disliked by 'the' literary 'establishment'.
the 'establishment' of a business/school/church/settlement
(..) ...now what? Now we wait for the Teacher's call. Good evening. I am Andr' Vernet, the night manager. I take it this is your first visit to our establishment? Yes. Understood. Keys are often passed on and first-time users... ...are sometimes (..)2006 The Da Vinci Code