The low state of the arts of design is remarkable, and is the more striking by the side of this mechanical skill in handling the metals. The fondness for parti-coloured and brilliant ornaments shows the want of a proper taste, which is sadly confirmed by the Gallic coins with their representations sometimes exceedingly simple, sometimes odd, but always childish in design, and almost without exception rude beyond parallel in their execution. It is perhaps unexampled that a coinage practised for centuries with a certain technical skill should have essentially limited itself to always imitating two or three Greek dies, and always with increasing deformity. On the other hand the art of poetry was highly valued by the Celts, and intimately blended with the religious and even with the political institutions of the nation; we find religious poetry, as well as that of the court and of the mendicant, flourishing[17]. Natural science and philosophy also found, although subject to the forms and fetters of the theology of the country, a certain amount of attention among the Celts; and Hellenic humanism met with a ready reception wherever and in whatever shape it approached them. The knowledge of writing was general at least among the priests. For the most part in free Gaul the Greek writing was made use of in Caesar's time, as was done among others by the Helvetii; but in its most southern districts even then, in consequence of intercourse with the Romanized Celts, the Latin attained predominance - we meet with it, for instance, on the Arvernian coins of this period.

The political development of the Celtic nation also presents very remarkable phenomena. The constitution of the state was based in this case, as everywhere, on the clan-canton, with its prince, its council of the elders, and its community of freemen capable of bearing arms; but the peculiarity in this case was that it never got beyond this cantonal constitution. Among the Greeks and Romans the canton was very early superseded by the ring-wall as the basis of political unity; where two cantons found themselves together within the same walls, they amalgamated into one commonwealth; where a body of burgesses assigned to a portion of their fellow-burgesses a new ring-wall, there regularly arose in this way a new state connected with the mother community only by ties of piety and, at most, of clientship. Among the Celts on the other hand the "burgess-bod" continued at all times to be the clan; prince and council presided over the canton and not over any town, and the general diet of the canton formed the authority of last resort in the state. The town had, as in the east, merely mercantile and strategic, not political importance; for which reason the Gallic townships, even when walled and very considerable such as Vienna and Genava, were in the view of the Greeks and Romans nothing but villages. In the time of Caesar the original clan-constitution still subsisted substantially unaltered among the insular Celts and in the northern cantons of the mainland; the general assembly held the supreme authority; the prince was in essential questions bound by its decrees; the common council was numerous - it numbered in certain clans six hundred members - but does not appear to have had more importance than the senate under the Roman kings.

In the more stirring southern portion of the land, again, one or two generations before Caesar - the children of the last kings were still living in his time - there had occurred, at least among the larger clans, the Arverni, Haedui, Sequani, Helvetii, a revolution which set aside the royal dominion and gave the power into the hands of the nobility.

It is simply the reverse side of the total want of urban commonwealths among the Celts just noticed, that the opposite pole of political development, knighthood, so thoroughly preponderates in the Celtic clan-constitution. The Celtic aristocracy was to all appearance a high nobility, for the most part perhaps the members of the royal or formerly royal families; as indeed it is remarkable that the heads of the opposite parties in the same clan very frequently belong to the same house. These great families combined in their hands financial, warlike, and political ascendency. They monopolized the leases of the profitable rights of the state. They compelled the free commons, who were oppressed by the burden of taxation, to borrow from them, and to surrender their freedom first de facto as debtors, then de jure as bondmen. They developed the system of retainers, that is, the privilege of the nobility to surround themselves with a number of hired mounted servants - the ambacti as they were called[18] - and thereby to form a state within the state; and, resting on the support of these troops of their own, they defied the legal authorities and the common levy and practically broke up the commonwealth. If in a clan, which numbered about 80,000 men capable of arms, a single noble could appear at the diet with 10,000 retainers, not reckoning the bondmen and the debtors, it is clear that such an one was more an independent dynast than a burgess of his clan. Moreover, the leading families of the different clans were closely connected and through intermarriages and special treaties formed virtually a compact league, in presence of which the single clan was powerless.

Therefore the communities were no longer able to maintain the public peace, and the law of the strong arm reigned throughout. The dependent found protection only from his master, whom duty and interest compelled to redress the injury inflicted on his client; the state had no longer the power to protect those who were free, and consequently these gave themselves over in numbers to some powerful man as clients.

The common assembly lost its political importance; and even the power of the prince, which should have checked the encroachments of the nobility, succumbed to it among the Celts as well as in Latium. In place of the king came the "judgment-worke" or Vergobretus[19], who was like the Roman consul nominated only for a year. So far as the canton still held together at all, it was led by the common council, in which naturally the heads of the aristocracy usurped the government. Of course under such circumstances there was agitation in the several clans much in the same way as there had been agitation in Latium for centuries after the expulsion of the kings: while the nobility of the different communities combined to form a separate alliance hostile to the power of the community, the multitude ceased not to desire the restoration of the monarchy; and not unfrequently a prominent nobleman attempted, as Spurius Cassius had done in Rome, with the support of the mass of those belonging to the canton to break down the power of his peers, and to reinstate the crown in its rights for his own special benefit.

While the individual cantons were thus irremediably declining, the sense of unity was at the same time powerfully stirring in the nation and seeking in various ways to take shape and hold. That combination of the whole Celtic nobility in contradistinction to the individual canton-unions, while disturbing the existing order of things, awakened and fostered the conception of the collective unity of the nation. The attacks directed against the nation from without, and the continued diminution of its territory in war with its neighbours, operated in the same direction. Like the Hellenes in their wars with the Persians, and the Italians in their wars with the Celts, the Transalpine Gauls seem to have become conscious of the existence and the power of their national unity in the wars against Rome. Amidst the dissensions of rival clans and all their feudal quarrelling there might still be heard the voices of those who were ready to purchase the independence of the nation at the cost of the independence of the several cantons, and even at that of the seignorial rights of the knights. The thorough popularity of the opposition to a foreign yoke was shown by the wars of Caesar, with reference to whom the Celtic patriot party occupied a position entirely similar to that of the German patriots towards Napoleon; its extent and organization are attested, among other things, by the telegraphic rapidity with which news was communicated from one point to another.