Rule Consequentialism and the Edict of Nikaea
In the Horus Heresy series, the Edict of Nikaea looms large as one of the setting’s most pivotal narrative events. With the Edict, the Emperor proscribed the use of Warp-derived psyker powers by the Legiones Astartes and nominally disbanded the psychically-gifted Librarius orders—at great cost both to the individual Astartes of the Librarius and to …