History of Western Philosophy - Bertrand Russell [246]
The honest man being disposed of, the practical politicians were free to resume their quarrel.
The Pope, having made peace with the Normans, ventured in 1157 to break with the Emperor. For twenty years there was almost continuous war between the Emperor on the one side, and the Pope with the Lombard cities on the other. The Normans mostly supported the Pope. The bulk of the fighting against the Emperor was done by the Lombard League, which spoke of 'liberty' and was inspired by intense popular feeling. The Emperor besieged various cities, and in 1162 even captured Milan, which he razed to the ground, compelling its citizens to live elsewhere. But five years later the League rebuilt Milan and the former inhabitants returned. In this same year, the Emperor, duly provided with an antipope,2 marched on Rome with a great army. The Pope fled, and his cause seemed desperate, but pestilence destroyed Frederick's army, and he returned to Germany a solitary fugitive. Although not only Sicily, but the Greek Emperor, now sided with the
Lombard League, Barbarossa made another attempt, ending in his defeat at the battle of Legnano in 1176. After this he was compelled to make peace, leaving to the cities all the substance of liberty. In the conflict between Empire and papacy, however, the terms of peace gave neither party complete victory.
Barbarossa's end was seemly. In 1189 he went on the third Crusade, and in the following year he died.
The rise of free cities is what proved of most ultimate importance in this long strife. The power of the Emperor was associated with the decaying feudal system; the power of the Pope, though still growing, was largely dependent upon the world's need of him as an antagonist to the Emperor, and therefore decayed when the Empire ceased to be a menace; but the power of the cities was new, a result of economic progress, and a source of new political forms. Although this does not appear in the twelfth century, the Italian cities, before long, developed a non-clerical culture which reached the very highest levels in literature, in art, and in science. All this was rendered possible by their successful resistance to Barbarossa.
All the great cities of Northern Italy lived by trade, and in the twelfth century the more settled conditions made traders more prosperous