On August 31, 161, Antoninus died, leaving Marcus as his sole successor. Marcus immediately acted to carry out what appears to have been Hadrian’s original intention (perhaps ignored by Antoninus) by pushing through the appointment of his adopted brother, Lucius Verus, as co-regent. Verus’s character has suffered by comparison with Marcus’s. Ancient sources, in particular the gossipy Historia Augusta, tend to paint him as a self-indulgent degenerate—almost another Nero. This may be unfair; it is certainly not the picture of him we get from Marcus’s own reminiscences in the Meditations. It does seem clear, however, that Marcus functioned as the senior emperor in fact if not name. It would be surprising if he had not. He was almost a decade older, and had been trained for the position by Antoninus himself.
What kind of ruler did this philosopher-king prove to be? Not, perhaps, as different from his predecessors as one might have expected. Though an emperor was all-powerful in theory, his ability to control policy was in reality much more limited. Much of his time was spent fielding problems that had moved up the administrative ladder: receiving embassies from the large cities of the empire, trying appeals of criminal cases, answering queries from provincial governors and dealing with petitions from individuals. Even with a fu