At first, the government could raise additional revenue from the sale of state property. Later, more unscrupulous emperors like Domitian (81-96 A.D.) would use trumped-up charges to confiscate the assets of the wealthy. They would also invent excuses to demand tribute from the provinces and the wealthy. Such tribute, called the aurum corinarium, was nominally voluntary and paid in gold to commemorate special occasions, such as the accession of a new emperor or a great military victory. Caracalla (198-217 A.D.) often reported such dubious "victories" as a way of raising revenue. Rostovtzeff (1957: 417) calls these levies "pure robbery." Although taxes on ordinary Romans were not raised, citizenship was greatly expanded in order to bring more people into the tax net. Taxes on the wealthy, however, were sharply increased, especially those on inheritances and manumissions (freeing of slaves). Occasionally, the tax burden would be moderated by a cancellation of back taxes or other measures. One such occasion occurred under the brief reign of Pertinax (193 A.D.), who replaced the rapacious Commodus (A.D. 176-192). As Edward Gibbon (1932: 88) tells us: Though every measure of injustice and extortion had been adopted, which could collect the property of the subject into the coffers of the prince; the rapaciousness of Commodus had been so very inadequate to his extravagance, that, upon his death, no more than eight thousand pounds were found in the exhausted treasury, to defray the current expenses of government, and to discharge the pressing demand of a liberal donative, which the new emperor had been obliged to promise to the Praetorian guards. Yet under these distressed circumstances, Pertinax had the generous firmness to remit all the oppressive taxes invented by Commodus, and to cancel all the unjust claims of the treasury; declaring in a decree to the senate, "that he was better satisfied to administer a poor republic with innocence, than to acquire riches by the ways of tyranny and dishonor." How Excessive Government Killed Ancient Rome Sound familier? History gives us a good clue as to what not to do, however these things are commonly ignored as we step forward into the same mistakes,.