The empire of the Ostrogoths, though established on principles of a just administration by the wisdom of the great Theodoric, soon began to suffer as complete a national demoralisation as that of the Vandals, though the Goths themselves, from being more civilised and living more directly under the restraint of laws which protected the property of their Roman subjects, had not become individually so corrupted by the possession of wealth. The conquest of Italy[13] had not produced any very great revolution in the state of the country. The Romans had long been accustomed to be defended in name, but in fact to be ruled, by the commanders of the mercenary troops in the emperor’s service. The Goths, even after the conquest, allowed them to retain two-thirds of their landed estates, with all their movable property; and as they had really been as completely excluded from military service under their own emperors, their social condition underwent but little change. Policy induced Theodoric to treat the inhabitants of Italy with mildness. The permanent maintenance of his conquests required a considerable revenue, and that revenue could only be supplied by the industry and civilisation of his Italian subjects. His sagacity told him that it was wiser to tax the Romans than to plunder them, and that it was necessary, in order to secure the fruits of a regular system of taxation, to leave them in the possession of those laws and privileges which enabled them to defend their civilisation. [Sidenote: [535-537 A.D.]]