During this man's rule, the legal code began to diverge into separate scales of punishment for noblemen and commoners, known 
During this man's rule, the legal code began to diverge into separate scales of punishment for noblemen and commoners, known as "honestiores" and "humiliores." His reign saw the introduction of a disease known as the Antonine Plague after he successfully defeated the Parthians. He ruled along with Verus after the death of Antoninus Pius, and this emperor's own death generally marks the end of the Pax Romana as it led to the accession of the unstable Commodus. For 10 points, name this emperor who ruled Rome from 161 to 180 CE.
During this man's rule, the legal code began to diverge into separate scales of punishment for noblemen and commoners, known as "honestiores" and "humiliores."
Caesar Marcus {Aurelius} Antoninus Augustus