Dear All, Bill Lawvere once told me that 'monad' had been the idea of Eilenberg. Later I asked him by email about the details and he answered the following: I do not remember in which year it was. (Maybe 1968, judging from vague allusions in Springer Lecture Notes 80.) In any case it was in the common room of the old castle at Oberwolfach when Sammy came out from behind the piano and announced the change. His informal speech emphasized that the word would inflect well: 'monadic' etc. He also explicitly said that nobody would ever confuse it with Leibnitzian monads. Jiri ---------- You're receiving this message because you're a member of the Categories mailing list group from Macquarie University. Leave group: https://outlook.office365.com/owa/categories@mq.edu.au/groupsubscription.ashx?source=EscalatedMessage&action=leave&GuestId=6bf90c14-94d1-45b7-a0b5-9dd447734d27