18 A Short History of the Middle East and the constant necessity for such supplementation gave rise in succeeding decades to the production, first orally and later in writing, of many scores of thousands of Traditions of the Prophet's conduct, each enshrining some legal or ritual principle. Many of these Traditions were fictitious, but the fiction was an innocent device whereby religious sanction could be obtained for sonic necessary piece of legislation, generally borrowed at this early stage from the customary law of Madina.1 It was also necessary, however, for the new Arab rulers to regu- late the legal position of the millions of their non-Muslim subjects, who represented the overwhelming majority of the population of the Empire.2 In this 'Umar followed the example of Mohammed, who had left undisturbed the Christian and Jewish communities of the northern Hijaz whom he brought under his sway, on condition of the payment of an annual tribute. 'Umar extended this usage to all the Christian and Jewish inhabitants of the Empire and to the Zoroastrians of Persia; and these subjects thus became known as the Alii adh-Dhimma or 'people of the covenant'. Far from there being any idea of compulsorily converting them to Islam, their role was to provide revenues for the Arab ruling-race by the payment of taxation, which apparently was at first lighter than that of the Byzantine Empire; and since Muslims were exempt from such taxation, the conversion of non-Muslims was actually discouraged, as it would have lessened the number of taxpayers. Since moreover the Muslim law (the Shari'a) was not applicable to the non-Muslim majority, they were left under the jurisdiction of the civil code which had obtained before the Conquest, such jurisdiction being now placed in the hands of their own religious dignitaries. This was the origin of the system of self-administering religious com- munities or millets which was to prevail throughout Islam until the collapse of the Ottoman Empire, and still survives for the purposes of civil law in that majority of Middle Eastern countries which have not yet undergone a thorough secularization.3 ^ For the compilation of fictitious documents by the early Christian Church with similarly innocent motives, cf. C.Delisle Burns, The First Europe (London, 1947), 3 54f. a It is hardly necessary in these days to remark that the traditional Christian account, that the Muslim conquerors gave the conquered Christians and Jews the choice only of conversion to Islam or death by the sword, is totally erroneous. 8 The institution had indeed already been foreshadowed in the dealings of the Hellenistic monarchies and the Roman Empire with the Oriental temple- communities under the authority of local priesthoods. In Alexandria under the