But the history of France during the 11th and 12th centuries does not entirely consist of these painful struggles of the Capet dynasty to shake off the fetters of feudalism. France, no longer split up into separate fragments, now began to exercise both intellectual and military influence over Europe. Everywhere her sons gave proof of rejuvenated activity. The Christian missions which others were reviving in Prussia and beginning in Hungary were undertaken on a vaster scale by the Capets. These "elder sons of the Church" made themselves responsible for carrying out the "work of God," and French pilgrims in the Holy Land prepared the great movement of the Crusades against the infidels. Religious faith, love of adventure, the hope of making advantageous conquests, anticipations of a promised paradise--all combined to force this advance upon the Orient, which though failing to rescue the sepulchre of Christ, the ephemeral kingdoms of Jerusalem and Cyprus, the dukedom of Athens, or the Latin empire of Constantinople, yet gained for France that prestige for military glory and religious piety which for centuries constituted her strength in the Levant (see CRUSADES). At the call of the pope other members of the French chivalry also made victorious expeditions against the Mussulmans, and founded the Christian kingdom of Portugal. Obeying that enterprising spirit which was to take them to England half a century later, Normans descended upon southern Italy and wrested rich lands from Greeks and Saracens.
In the domain of intellect the advance of the French showed a no less dazzling and a no less universal activity; they sang as well as they fought, and their epics were worthy of their swordsmanship, while their cathedrals were hymns in stone as ardent as their soaring flights of devotion. In this period of intense religious life France was always in the vanguard. It was the ideas of Cluniac monks that freed the Church from feudal supremacy, and in the 11th century produced a Pope Gregory VII.; the spirit of free investigation shown by the heretics of Orleans inspired the rude Breton, Abelard, in the 12th century; and with Gerbert and Fulbert of Chartres the schools first kindled that brilliant light which the university of Paris, organized by Philip Augustus, was to shed over the world from the heights of Sainte-Geneviève. In the quarrels of the priesthood under the Empire it was St Bernard, the great abbot of Clairvaux, who tried to arrest the papacy on the slippery downward path of theocracy; finally, it was in Suger's church of St Denis that French art began that struggle between light against darkness which, culminating in Notre-Dame and the Sainte-Chapelle, was to teach the architects of the world the delight of building with airiness of effect. The old basilica which contains the history of the monarchy sums up the whole of Gothic art to this day, and it was Suger who in the domain of art and politics brought forward once more the conception of unity. The courteous ideal of French chivalry, with its "delectable" language, was adopted by all seigniorial Europe, which thus became animated, as it were, by the life-blood of France. Similarly, in the universal movement of those forces which made for freedom, France began the age-long struggle to maintain the rights of civil society and continually to enlarge the social categories. The townsman enriched by commerce and the emancipated peasant tried more or less valiantly to shake off the yoke of the feudal system, which had been greatly weakened, if not entirely broken down, by the crusades. Grouped around their belfry-towers and organized within their gilds, they made merry in their free jocular language over their own hardships, and still more over the vices of their lords. They insinuated themselves into the counsels of their ignorant masters, and though still sitting humbly at the feet of the barons, these upright and well-educated servitors were already dreaming of the great deeds they would do when their tyrants should have vacated their high position, and when royalty should have summoned them to power.