It may appear, perhaps, to some who have examined the lives and deaths of the Roman emperors that many of them would be an example contrary to my opinion, seeing that some of them lived nobly and showed great qualities of soul, nevertheless they have lost their empire or have been killed by subjects who have conspired against them. Wishing, therefore, to answer these objections, I will recall the characters of some of the emperors, and will show that the causes of their ruin were not different to those alleged by me; at the same time I will only submit for consideration those things that are noteworthy to him who studies the affairs of those times.

It seems to me sufficient to take all those emperors who succeeded to the empire from Marcus the philosopher down to Maximinus; they were Marcus and his son Commodus, Pertinax, Julian, Severus and his son Antoninus Caracalla, Macrinus, Heliogabalus, Alexander, and Maximinus.