decay. The strength and riches of the civilized world became inadequate to make head against the nomad population which skirted its northern frontier; they overran the empire, and a different order of things succeeded.
In the new frame in which European society was now cast, the population of each country may be considered as composed, in unequal proportions, of two distinct nations or races, the conquerors and the conquered: the first the proprietors of the land, the latter the tillers of it. These tillers were allowed to occupy the land on conditions which, being the product of force, were always onerous, but seldom to the extent of absolute slavery. Already, in the later times of the Roman empire, predial slavery had extensively transformed itself into a kind of serfdom: the coloni of the Romans were rather villeins than actual slaves; and the incapacity and distaste of the barbarian conquerors for personally superintending industrial occupations, left no alternative but to allow to the cultivators, as an incentive to exertion, some real interest in the soil. If, for example, they were compelled to labour, three days in the week, for their superior, the produce of the remaining days was their own. If they were required to supply the provisions of various sorts, ordinarily needed for the consumption of the castle, and were often subject to requisitions in excess, yet after supplying these demands they were suffered to dispose at their will of whatever additional produce they could raise. Under this system during the Middle Ages it was not impossible, no more than in modern Russia (where, up to the recent measure of emancipation, the same system still essentially prevailed), for serfs to acquire property; and in fact, their accumulations are the primitive source of the wealth of modern Europe.
In that age of violence and disorder, the first use made by a serf of any small provision which he had been able to accumulate, was to buy his freedom and withdraw himself to some town or fortified village, which had remained undestroyed from the time of the Roman dominion; or, without buying
