We have information on the 18th Roman Emperor, Commodus , from the writings of ancient historians (one of whom, Cassius Dio, was a Senator and knew Commodus personally) and from extensive archaelogical evidence. Commodus became sole emperor on the the death of his father, Marcus Aurelius, in 180 CE, at the age of 19. At least nominally he had already been co-emperor for a few years. For the previous 40 years, the emperors, although in reality absolute monarchs, had behaved as aristocratic yet approachable rulers of impeccable personal morals, in a sort of Victorian fashion, while assuming the role of commander-in-chief when necessary and spending much time on actual administration. Commodus changed radically the public and private role of the emperor, in ways that were unprecedented and completely baffled contemporaries. They were not a response to circumstances since his "innovations" were almost all reversed after his death. So they must be attributed to his...
An international resource on Socionics, a theory of personality type.