Meanwhile Western Europe was overrun by men who in their early home had been Republicans. The primitive constitution of the German communities was based on association rather than on subordination. They were accustomed to govern their affairs by common deliberation, and to obey authorities that were temporary and defined. It is one of the desperate enterprises of historical science to trace the free institutions of Europe and America, and Australia, to the life that was led in the forests of Germany. But the new States were founded on conquest, and in war the Germans were commanded by kings. The doctrine of self-government, applied to Gaul and Spain, would have made Frank and Goth disappear in the mass of the conquered people. It needed all the resources of a vigorous monarchy, of a military aristocracy, and of a territorial clergy, to construct States that were able to last. The result was the feudal system, the most absolute contradiction of democracy that has coexisted with civilisation. The revival of democracy was due neither to the Christian Church nor to the Teutonic State, but to the quarrel between them. The effect followed the cause instantaneously. As soon as Gregory VII. made the Papacy independent of the Empire, the great conflict began; and the same pontificate gave birth to the theory of the sovereignty of the people. The Gregorian party argued that the Emperor derived his crown from the nation, and that the nation could take away what it had bestowed. The Imperialists replied that nobody could take away what the nation had given. It is idle to look for the spark either in flint or steel. The object of both parties was unqualified supremacy. Fitznigel has no more idea of ecclesiastical liberty than John of Salisbury of political. Innocent IV. is as perfect an absolutist as Peter de Vineis. But each party encouraged democracy in turn, by seeking the aid of the towns; each party in turn appealed to the people, and gave strength to the constitutional theory. In the fourteenth century English Parliaments judged and deposed their kings, as a matter of right; the Estates governed France without king or noble; and the wealth and liberties of the towns, which had worked out their independence from the centre of Italy to the North Sea, promised for a moment to transform European society. Even in the capitals of great princes, in Rome, in Paris, and, for two terrible days, in London, the commons obtained sway. But the curse of instability was on the municipal republics. Strasburg, according to Erasmus and Bodin, the best governed of all, suffered from perpetual commotions. An ingenious historian has reckoned seven thousand revolutions in the Italian cities. The democracies succeeded no better than feudalism in regulating the balance between rich and poor. The atrocities of the Jacquerie, and of Wat Tyler's rebellion, hardened the hearts of men against the common people. Church and State combined to put them down.