The population of Thessaly, beside the penests, whose condition was nearly that of the Laconian helots, included a large class of free subjects, in the districts not immediately occupied by the Thessalian invaders, who paid a certain tribute for their lands, but, though not admitted to the rights of citizens, preserved their personal liberty unmolested. But above this class stood a third, of the common Thessalians, who, though they could not boast, like the Aleuadæ and the Scopadæ, of a heroic descent, and had therefore received a much smaller portion of the conquered land, still, as the partners of their conquest, might think themselves entitled to some share in the administration of public affairs. Contests seem early to have arisen between this commonalty and the ruling families, and at Larissa the aristocracy of the Aleuadæ was tempered by some institutions of a popular tendency. We do not know indeed to what period Aristotle refers, when he speaks of certain magistrates at Larissa who bore the title of guardians of the freemen, and exercised a superintendence over the admission of citizens, but were themselves elected by the whole body of the people, out of the privileged order, and hence were led to pay their court to the multitude in a manner which proved dangerous to the interests of the oligarchy. It seems not improbable that the election of a tagus, like that of a dictator at Rome, was sometimes used as an expedient for keeping the commonalty under. But the power of the oligarchs was also shaken by intestine feuds; and, under the government of the Aleuadæ, such was the state of parties at Larissa, that, by common agreement, the city was committed to the care of an officer, who was chosen, perhaps from the commonalty, to mediate between the opposite factions; but, being entrusted with a body of troops, made himself master of both. This event took place two generations before the Persian War; but the usurpation appears to have been transitory, and not to have left any durable traces, while the factions of Larissa continue to appear from time to time throughout the whole course of Grecian history. The western states of Greece are, during this period, shrouded in so complete obscurity, that we cannot pretend to give any account of their condition. With respect to the Ætolians indeed it is uncertain how far they are entitled to the name of Greeks. The Acarnanians, as soon as they begin to take a part in the affairs of Greece, distinguish themselves as a finer and more civilised people; and it is probable that the Corinthian colonies on the Ambracian Gulf may have exerted a beneficial influence on their social progress.[b] CORINTH UNDER PERIANDER