Even could the device of representation have occurred to the mind of some statesman trained in Roman methods, it would probably have made no difference. Nobody would have known how to use it. You cannot invent an institution as you would invent a plough. Such a notion as that of representative government must needs start from small beginnings and grow in men's minds until it should become part and parcel of their mental habits. For the want of it the home government at Rome became more and more unmanageable until it fell into the hands of the army, while at the same time the administration of the empire became more and more centralized; the people of its various provinces, even while their social condition was in some respects improved, had less and less voice in the management of their local affairs, and thus the spirit of personal independence was gradually weakened. This centralization was greatly intensified by the perpetual danger of invasion on the northern and eastern frontiers, all the way from the Rhine to the Euphrates. Do what it would, the government must become more and more a military despotism, must revert toward the Oriental type. The period extending from the third century before Christ to the third century after was a period of extraordinary intellectual expansion and moral awakening; but when we observe the governmental changes introduced under the emperor Diocletian at the very end of this period, we realize how serious had been the political retrogression, how grave the danger that the stream of human life might come to stagnate in Europe, as it had long since stagnated in Asia.