In the same manner as each state was divided into two rival factions, so was the whole of Gaul (with the exception of Belgic Gaul and Helvetia) divided into two great parties,[146] which exercised over the others a sort of sovereignty (_principatus_);[147] and when, in extraordinary circumstances, the whole of Gaul acknowledged the pre-eminence of one particular state, the chief of the privileged state took the name of _princeps totius Galliæ_, as had been the case with the Arvernan Celtillus, the father of Vercingetorix.[148] This supremacy, nevertheless, was not permanent; it passed from one nation to another, and was the object of continual ambitions and sanguinary conflicts. The Druids, it is true, had succeeded in establishing a religious centre, but there existed no political centre. In spite of certain federative ties, each state had been more engaged in the consideration of its own individuality than in that of the country in general. This egoistic carelessness of their collective interests, this jealous rivality among the different tribes, paralysed the efforts of a few eminent men who were desirous of founding a nationality, and the Gauls soon furnished the enemy with an easy means of dividing and combating them. The Emperor Napoleon I. was thus right in saying: “The principal cause of the weakness of Gaul was the spirit of isolation and locality which characterised the population; at this epoch the Gauls had no national spirit or even provincial spirit; they were governed by a spirit of town. It is the same spirit which has since forged chains for Italy. Nothing is more opposed to national spirit, to general ideas of liberty, than the particular spirit of family or of town. From this parcelling it resulted that the Gauls had no army of the line kept up and exercised; and therefore no art and no military science. Every nation which should lose sight of the importance of an army of the line perpetually on foot, and which should trust to levies or national armies, would experience the fate of the Gauls, without even having the glory of opposing the same resistance, which was the effect of the barbarism of the time and of the ground, covered with forests, marshes, and bogs, and without roads, which rendered it difficult to conquer and easy to defend.”[149] Before Cæsar came into Gaul, the Ædui and the Arverni were at the head of the two contending parties, each labouring to carry the day against his rival. Soon these latter united with the Sequani, who, jealous of the superiority of the Ædui, the allies of the Roman people, invoked the support of Ariovistus and the Germans. By dint of sacrifices and promises, they had succeeded in bringing them into their territory. With this aid the Sequani had gained the victory in several combats.[150] The Ædui had lost their nobility, a part of their territory, nearly all their clients, and, after giving up as hostages their children and their chiefs, they had bound themselves by oath never