When such power fell into the hands of a Caligula or a Commodus, who would not take the trouble of governing, it was really little more than an entire exemption of the Cæsars from all law and all restraints. The government seems to have gone on throughout the Roman Empire much as usual. But there was in Rome itself one miserable youth, mad with absolute licence, who could with impunity order the murder of any one whom it struck his fancy to destroy, for any cause, or for no cause, or because he was in want of money, and might take the property of any one he was pleased to murder.
It was but for a time comparatively short that this state of things lasted. Still, under the best reigns, one can hardly doubt, that there must have been an uneasy feeling in the mind of the Emperor, as well as of his subjects, that his successor might renew the times of Caligula or Nero. Under the Antonines, perhaps, when there was a long succession of good governors for more than eighty years without interruption, men may have learned to look back on such things as belonging exclusively to a by-gone age. But they were too soon undeceived, after the death of Marcus Aurelius had left the succession open to his unworthy son. Yet the crimes even of the worst of the Cæsars affected Rome, not the world, and, indeed, in Rome itself, almost exclusively a single class--the senators and the rich. They seem, therefore, hardly to have been considered as an interruption of the general felicity of the Pax Romana; any more than an epidemic of cholera in our own days, which for a moment strikes terror upon the city which it attacks, but is forgotten almost as soon as it passes away.