Severus and his son, growing in wisdom, stature, and prosperity, and, as far as we know, in favour with God and man, until the tragic events of the year 217 made it appear that the fortunes of the family had come to a sudden and decided collapse. The circumstances of the death of Caracalla were typical of that age of sovereignty. As a general rule the knife gave what a dish of mushrooms took away. Caracalla's government had been cruel and severe in the extreme, but he was adored by the army, with whom he lived and worked, not as Emperor, but as comrade. For them he could never do enough in the way of privileges, for them the treasury was depleted, and cities turned into cemeteries that they might have the booty. Fighting was as natural to him as to a tiger cat ; and fighting he died. It was for the pursuit of a campaign against the Parthians that the Emperor and Court had moved to Antioch in Syria, where Julia, his mother, was acting as Secretary of State, while the Emperor was bounding like a panther upon the various cities of Mesopotamia. In the pursuit of her duties, it happened that there came into her hands certain letters warning her of a plot against her son's life.
With the army at that time was a praefect, Opilius Macrinus by name, a Moorish lawyer of low birth and pedantic habits. He had been procurator to Plautianus, the so-called traitor, whom both Julia and Caracalla had hated. Now Macrinus had been honoured by Severus after Plautianus' murder, and still stood high in the imperial favour — though he was treated by the Emperor, says Dion, as a sort of
