The weakly connected organization that most scribes declare some allegiance too. The brotherhood represents the pursuit of knowledge following the results of the Great Whump throughout the waste.
The are thoroughly un-unified and state it as such so they will not be mistaken for a rival corporation or kennel, and because each scribe desires his own fame above that of any others. They still have a stubborn respect for their brethren in the field, trying to find out how and why and what the Avantsphere is.