Thus while Nero's attack on the Christians was in a sense an accident, the blind rush of a half-crazed beast, the later persecutions were often directed by serious and well-intentioned emperors and magistrates. The Romans were far from being intolerant. They had interfered very little with the religions of their subject races, and had, indeed, adopted more than one foreign god into their own temples. They were quite willing that the Christ should be worshipped. What they could not understand was that reverence to one god should forbid reverence to another. It was the new religion which was intolerant, which, in the passionate intensity of its faith, attacked the old gods, denied their existence, or declared them devils. When a man was summoned before a Roman court on the charge of being a Christian, he was not, as a rule, asked to deny Christ; only, there being a general impression that his sect was evil, he was required to prove his honest citizenship and general good character by doing reverence to the Roman gods.[9] In spite of persecution, some writers say because of it, Christianity spread. Toward the end of the first two hundred years of the Empire, it seemed about the only prosperous institution in a world which was beginning to go badly. During the reign of Marcus Aurelius, the last of the "good" emperors (161-180), troubles, some accidental, some inherent in the Roman system, were gathering very dark. The curse of inaction, of wealth without liberty, of intellect without a goal to strive toward, had long been corrupting the upper classes. Now, a terrible plague swept the world from end to end, so that laborers became scarce, lands went untenanted, taxes unpaid. The drain of supporting Rome's boundless extravagance, in buildings, feasts, and gladiatorial displays, began to tell upon the provinces at last. Newer and ever harsher methods had to be employed to wring money from exhausted lands. Driven by their sufferings to cling to religion as a support, men thought of it more seriously; and a cry went up that earth was being punished for its neglect and insult of the ancient gods. The Christians were persecuted anew.[10] THE PERIOD OF DECAY The reign of Commodus,[11] son of Marcus Aurelius, marks the beginning of a century which sank almost into anarchy. He was murdered, and his guards auctioned the Empire to the highest bidder. Once more the legions fought against each other and placed their generals upon the throne. During ninety-two years there were twenty-five emperors fully acknowledged, besides a far larger number of claimants who were overthrown before Rome had time to hear of and salute them. The Imperial city was no longer mistress of the world; she was only its capital, as feeble and helpless as the other cities, which these unstable emperors began at times to favor in her stead.