The new life of Italy, so to speak, came of the ultimate impotence of the northern invaders for imperialism. Again and again, from the time of Odoaker, we find signs of a growth of new life in the cities, now partly thrown on their own resources; and it is only the too great stress of the subsequent invasions that postpones their fuller growth for so many centuries. It is to be remembered that these invasions wrought absolute devastation where, even under Roman rule, there had been comparative well-being. Thus the province of Illyria, between the Alps and the Danube, whose outlying and exposed character made it unattractive to the senatorial monopolists, was under the Empire well populated by a free peasantry, who abundantly recruited the army.[496] In the successive invasions this population was almost obliterated; and when Odoaker conquered the Rugians, who then held the territory, he brought multitudes of them into stricken Italy, to people and cultivate its waste lands.[497] Theodoric, in turn, is held to have revived prosperity after overthrowing Odoaker; and we have seen reason to believe that after the loss of Africa even southern Italy perforce revived her agriculture;[498] but early in Theodoric's reign (496) we find Pope Gelasius declaring, doubtless with exaggeration, that in the provinces of Aemilia and Tuscany human life was almost extinct; while Ambrose writes that Bologna, Modena, Reggio, Piacenza, and the adjacent country remained ruined and desolate.[499] After Theodoric, Belisarius, in a struggle that exhausted central Italy, almost annihilated the Goths; and under Narses, who finished the conquest, there was again some recovery, the scattered remnants of the population congregating in the towns, so that Milan and others made fresh headway,[500] though the country remained in large part deserted.