This Arabian concept of nationality is a new and wholly decisive fact. The frontiers between “home” and “abroad” lay in the Apollinian world between every two towns, and in the Magian between every two creed-communities. What the “enemy,” the peregrin, was to the Roman, the Pagan was to the Christian, the Amhaarez to the Jew. What the acquisition of Roman citizenship meant for the Gaul or the Greek in Cæsar’s time, Christian baptism meant for him now--entry into the leading nation of the leading Culture.[93] The Persians of the Sassanid period no longer conceived of themselves, as their predecessors of Achæmenid times had done, as a unit by virtue of origin and speech, but as a unit of Mazdaist believers, _vis-à-vis_ unbelievers, irrespective of the fact that the latter might be of pure Persian origin (as indeed the bulk of the Nestorians were). So also with the Jews, and later the Mandæans and Manichæans, and later again the Monophysite and the Nestorian Christians--each body felt itself a nation, a legal community, a juristic person in a new sense. Thus there arises a group of Early Arabian laws, differentiated according to religions as decisively as Classical laws are differentiated according to cities. In the realm of the Sassanids schools arose for the teaching the Zoroastrian law proper to them; the Jews, who formed an exceedingly large portion of the population from Armenia to Sabæa, created their proper law in the Talmud, which was completed and closed some few years before the _Corpus Juris_. Each one of these Churches had its peculiar jurisdiction, independent of the geographical frontiers of the moment--as in the East to-day--and the judge representing the ground-lord judged only cases between parties of different faiths. The self-jurisdiction of the Jews within the Empire had never been contested by anyone, but the Nestorians and the Monophysites also began, very soon after their separation, to create and to apply laws of their own, and thus by a negative process--i.e., by the gradual withdrawal of all heterodox communities--Roman imperial law came to be the law of the Christians who confessed the same creed as the Emperor. Hence the importance of the Roman-Syrian law-book, which has been preserved in several languages. It was probably[94] pre-Constantinian and written in the chancery of the Patriarch of Antioch; it is quite unmistakably Early Arabian law in Late Classical form, and, as its many translations indicate, it owed its currency to the opposition to the orthodox Imperial Church. It was without doubt the basis of Monophysite law, and it reigned till the coming of Islam over a field far larger than that of the _Corpus Juris_.