nents condemned slavery and promoted a remarkable spread of philanthropy.
It was, however, not possible for the Stoics to condemn war. Some of the more ardent and less practical humanitarians of the time did this, but no alert Roman citizen could advocate the abolition of the legions. The Empire was completely surrounded by barbarians who would rush in and trample on its civilisation the moment the fence of spears was removed. From the turreted walls in the north of England, where men watched the Picts and Scots, to the deserts of Mesopotamia—from the banks of the Danube and Rhine to the spurs of the Atlas—it was essential to maintain those bronzed legions who guarded the civilised provinces from marauders. With those outlying barbarians no treaty was possible or sacred; no legal tribunal would have protected those frontiers from the men who looked covetously on the fertile fields and comfortable cities of the Roman provinces. From the first to the fourth century Rome fought, not for its expansion, but for its preservation against these increasing enemies; and it was the final intensification of the pressure in the Danube region by the arrival of enormous hordes of barbarians from Asia which precipitated the final catastrophe. Paganism had never the slightest opportunity to abandon the military system, and only those who are totally unacquainted with Roman history can wonder why it did not make the attempt. It would have been a crime to abandon the civilised provinces to barbarism.
This was the essential position of the Roman Empire: the civil wars of the fourth century, by which its military system was abused, need not be
