‘In the text of Gaius, the words or portions of words which are purely conjectural are denoted by italics. The orthography of the Veronese MS. is extremely inconstant. Some of these inconstancies it will be seen are retained: e.g. the spelling oscillates between the forms praegnas and praegnans, nanctus and nactus, erciscere and herciscere, prendere and prehendere, diminuere and deminuere, parentum and parentium, vulgo and volgo, apud and aput, sed and set, proxumus and proximus, affectus and adfectus, inponere and imponere &c. Some irregularities likely to embarrass the reader, e. g. the substitution of v for b in debitor and probare, the substitution of b for v in servus and vitium, have been tacitly corrected. The numeration of the paragraphs was introduced by Goeschen in his first edition of Gaius, and for convenience of reference has been retained by all subsequent editors. The rubrics or titles marking the larger divisions of the subject, with the exception of a few at the beginning, are not found in the Veronese MS. Those that are found are supposed not to be the work of Gaius, but of a transcriber. The remainder are partly taken from the corresponding sections of Justinian’s Institutes, partly invented or adopted from other editors.’
§ 21.: The Life and Works of Gaius.
Of the life of Gaius we know little. Even his full name has been lost; for, if ‘Gaius’ is the familiar Roman praenomen Ref. 164, he must have had a family or gentile name as well. It is probable that he was a foreigner by birth—a Greek or a Hellenised Asiatic; but it is also probable that he was a Roman citizen, and possible that he taught at Rome. It is not likely that he belonged to the class of patented jurisconsults; for his opinions are not quoted by the subsequent jurists whose fragments are preserved in the Digest; it has even been inferred that he was not a practising lawyer; for amidst his voluminous writings there is no trace of any work on Quaestiones. His treatises may all have been of a professorial kind. They included, beside the Institutions, Commentaries on the Provincial Edict and the Urban Edict; a work on the Lex Julia et Papia Poppaea; a Commentary on the Twelve Tables; a book called Aurea or Res Quotidianae, treating of legal doctrines of general application and utility in every-day life; a book on Cases (apparently of a hypothetical character); one on Rules of Law (Regulae); and special treatises on Verbal Obligations, Manumissions, Fideicommissa, Dowries, and Hypotheca. He also wrote on the Tertullian and Orphitian Senatusconsults. Gaius’s Commentary on the Provincial Edict is the only work of the kind known to us. It is not necessary to believe that this Provincial Edict was the edict of the particular province (perhaps Asia) of which he was a native. It may have been a redaction of the elements common to all Provincial Edicts Ref. 165.
The value attached to Gaius’s powers of theoretical exposition, and to the admirable clearness and method which made his Institutions the basis of all future teaching in Roman law, must have been great; for, in spite of the fact that he was not a patented jurisconsult, he appears by the side of Papinian, Paulus, Ulpian, and Modestinus, in the ‘Law of Citations’ issued by Theodosius II and Valentinian III in 426 a. d. The beginning of this enactment runs Ref. 166: ‘We accord our approval to all the writings of Papinian, Paulus, Gaius, Ulpian, and Modestinus, granting to Gaius the same authority that is enjoyed by Paulus, Ulpian and the others, and sanctioning the citation of all his works.’
Although so little is known of Gaius, yet his date can be approximately determined from the internal evidence of his works. ‘We know that he flourished under the Emperors Hadrian (117-138 a. d.), Antoninus Pius (138-161 a. d.) and Marcus Aurelius Antoninus (161-180 a. d.). Gaius himself mentions that he was a contemporary of Hadrian, Dig. 34, 5, 7 pr. He apparently wrote the First Book of his Institutions under Antoninus Pius, whom he mentions, § 53, § 74, § 102, without the epithet Divus (of divine or venerable memory), a term only applied to emperors after their decease, but in the Second Book, § 195, with this epithet. The Antoninus mentioned, § 126, is either Pius or Marcus Aurelius Philosophus. Respecting the rules of Cretio, 2. § 177 Gaius appears not to be cognizant of a Constitution of Marcus Aurelius mentioned by Ulpian, 22, 34. That he survived to the time of Commodus appears from his having written a treatise on the Sc. Orphitianum (178 a. d.), an enactment passed under that emperor’ during his joint rule with his father Marcus Aurelius (177-180 a. d.). This is the latest date which is traceable in the life of Gaius.
Gaius was thus an elder contemporary of Papinian, who had already entered active life in the reign of Marcus Aurelius; and he stands at the threshold of that brilliant period of the close of Roman Jurisprudence which contains the names of Scaevola, Papinian, Ulpian and Paulus, and extends from the reign of Marcus Aurelius to that of Severus Alexander (180-235 a. d.).
BOOK I. STATUS OR UNEQUAL RIGHTS [DE PERSONIS]
I. ON CIVIL LAW AND NATURAL LAW.
§ 1. The laws of every people governed by statutes and customs are partly peculiar to itself, partly common to all mankind. The rules established by a given state for its own members are peculiar to itself, and are called jus civile; the rules constituted by natural reason for all are observed by all nations alike, and are called jus gentium. So the laws of the people of Rome are partly peculiar to itself, partly common to all nations; and this distinction shall be explained in detail in each place as it occurs.
§ 2. Roman law consists of statutes, plebiscites, senatusconsults, constitutions of the emperors, edicts of magistrates authorized to issue them, and opinions of jurists.
§ 3. A statute is a command and ordinance of the people: a plebiscite is a command and ordinance of the commonalty. The commonalty and the people are thus distinguished: the people are all the citizens, including the patricians; the commonalty are all the citizens, except the patricians. Whence in former times the patricians maintained that they were not bound by the plebiscites, as passed without their authority; but afterwards a statute called the lex Hortensia was enacted, which provided that the plebiscites should bind the people, and thus plebiscites were made co-ordinate with statutes.
§ 4. A senatusconsult is a command and ordinance of the senate, and has the force of a statute, a point which was formerly controverted.
§ 5. A constitution is law established by the emperor either by decree, edict, or letter; and was always recognized as having the force of a statute, since it is by a statute that the emperor himself acquires supreme executive power.
§ 6. Power to issue edicts is vested in magistrates of the people of Rome, the amplest authority belonging to the edicts of the two praetors, the home praetor and the foreign praetor, whose provincial jurisdiction is vested in the presidents of the provinces, and to the edicts of the curule aediles, whose jurisdiction in the provinces of the people of Rome is vested in quaestors: in the provinces of the emperor no quaestors are appointed, and in these provinces, accordingly, the edict of the aediles is not published.
§ 7. The answers of jurists are the decisions and opinions of persons authorized to lay down the law. If they are unanimous their decision has the force of law; if they disagree, the judge may follow whichever opinion he chooses, as is ruled by a rescript of the late emperor Hadrian.
§ 1.Jurisprudence treats exclusively of positive law: the exclusive origin of positive law is some positive enactment; the term positive enactment including both the express or direct enactments of the political sovereign, and the implied, indirect, circuitous enactments imported by the sovereign’s acquiescence in the ruling of subordinate authorities. (See Holland’s Jurisprudence, chs. 2-5.)
The rules and principles denoted by the terms praetor-made law, jurist-made law, judge-made law, are only law because they are impliedly adopted, confirmed, and ratified by the silent acquiescence of the sovereign.
The