under certain restrictions framed to prevent fraud or injustice. Justinian abolished the personal conditions which the legislation of Augustus had required to be satisfied by the master who eman cipated and the slave who was manumitted, and removed the limitation of number. The liberated slave, whatever the process by which he had obtained his freedom, became at once a full citi zen, his former master, however, retaining the right of patronage, the abolition of which would probably have discouraged emanci pation.
extent employed in the cultivation of land as hired labourers, and, as we shall presently find, also as tenants on the great estates. How all this operated we shall understand when we examine the remark able organization of the State introduced by Diocletian and his successors. (3) This organization established in the Roman world a personal and hereditary fixity of professions and situations which was not very far removed from the caste system of the East. The purpose of this was doubtless to resist by a strong internal consoli dation the shock of the invasions, to secure public order, to enforce industrious habits, and to guarantee the financial resources of the State. Personal independence was largely sacrificed, but those still more important ends were in a great measure attained. This sys tem, by diminishing the freeman's mastery over himself and his power to determine his occupation, reduced the interval between him and the slave ; and the latter on the one hand, the free domes tic servant and workshop labourer on the other, both passed insens ibly into the common condition of serfdom. (4) The corresponding change, in the case of the rural slaves, took place through their being merged in the order of coloni. The Roman colonus was originally a free person who took land on lease contracting to pay to the proprietor either a fixed sum annually or (when a colonus partiarius) a certain proportion of the produce of the farm. Under the emperors of the 4th century the name designated a cultivator who, though personally free, was attached to the soil, and transmitted his condition to his descendants; and this became the regular status of the mass of Roman cultivators. The class of coloni appears to have been composed partly of tenants by contract who had incurred large arrears of rent and were detained on the estates as debtors (obaerati), partly of foreign captives or immigrants who were settled in this condition on the land, and partly of small proprietors and other poor men who voluntarily adopted the status as an improvement in their position. They paid a fixed proportion of the produce (pars agraria) to the owner of the estate, and gave a determinate amount of labour (operae) on the portion of the domain which he kept in his own hands (mansus dominicus). The law for a long time took no notice of these customary tenures, and did not systematically constitute them until the 4th century. It was, indeed, the requirements of the fiscus and the conscription which impelled the imperial Govern ment to regulate the system. The coloni were inscribed (ad scripti) on the registers of the census as paying taxes to the State, for which the proprietor was responsible, reimbursing himself for the amount. In a constitution of Constantine (A.D. 332) we find the colonus recognized as permanently attached to the land. If he abandoned his holding he was brought back and punished ; and anyone who received him had not only to restore him but to pay a penalty. He could not marry out of the domain ; if he took for wife a colona of another proprietor, she was restored to her original locality, and the offspring of the union were divided between the estates. The children of a colonus were fixed in the same status. They and their descendants were retained, in the words of a law of Theodosius, "quodam aeternitatis jure," and by no process could be relieved from their obligations. By a law of Anastasius, at the end of the 5th century, a colonus who had voluntarily come into an estate was by a tenure of 3o years for ever attached to it. The master (dominus) could inflict on his coloni "moderate chastisement," and could chain them if they attempted to escape, but they had a legal remedy against him for unjust demands or injury to them or theirs. In no case could the rent or the labour dues be increased. The colonus could possess property of his own, but could not alienate it without the con sent of the master. Thus, whilst the members of the class were personally free, their condition had some incidents of a semi servile character. They are actually designated by Theodosius, "servi terrae cui nati sunt." And Salvian treats the proposition "coloni divitum fiunt" as equivalent to "vertuntur in servos." This is, indeed, an exaggeration ; the colonat-us was not an oppressive system ; it afforded real security against unreasonable demands and wanton disturbance, and it was a great advance on the sys tem of the familia rustica. But the point which is important is that there was a certain approximation between the condition of the colonus and the slave which tended towards the fusion of both in a single class.
Besides the coloni there were on a great estate—and those of the 4th century were on a specially large scale—a number of predial slaves, who worked collectively under overseers on the part of the property which the owner himself cultivated. But it was a common practice to settle certain of the slaves (and pos sibly also of the freedmen) on other portions of the estate, giving them small farms on conditions similar to those to which the coloni were subject. These slaves are, in fact, described by Ulpian as quasi coloni. They had their own households and were hence distinguished as casati. In law these slaves were at first absolutely at the disposal of their masters ; they had no property in the strict sense of the word, and could be sold to another proprietor and separated from their families. But the landlord's interest and the general tone of feeling alike modified practice even before the intervention of legislation ; they were habitually continued in their holdings, and came to possess in fact a perpetual and hereditary enjoyment of them. By a law of Valentinian I. (377) the sale of these slaves was interdicted unless the land they occupied was at the same time sold. The legal distinction between the coloni and the slave tenants continued to exist after the invasions; but the practical difference was greatly attenuated. The colonus often occupied a servile mansus, and the slave a mansus originally appro priated to a colonus. Intermarriages of the two classes became frequent. Already at the end of the 7th century it does not appear that the distinction between them had any substantial existence.
The influence of the Northern invasions on the change from slavery to serfdom was, in all probability, of little account. The change would have taken place, though perhaps not so speedily, if they had never occurred. For the developments of the middle ages see SERFDOM and VILLEINAGE.