in the Babylonian cities Sura and Pumbeditha, enjoyed far more than local authority. The Jews of Persia were practically independent of external control. Their official heads were the Exilarchs, who reigned over the Jews as viceroys of the caliphs. The Gaonim were the religious heads of an emancipated community. The Exilarchs possessed a princely revenue, which they devoted in part to the schools over which the Gaonim presided. This position of authority, added to the world-wide repute of the two schools, gave the Gaonim an influence which extended beyond their own neighborhood. From all parts of the Jewish world their guidance was sought and their opinions solicited on a vast variety of subjects, mainly, but not exclusively, religious and literary. Amid the growing complications of ritual law, a desire was felt for terse prescriptions, clear-cut decisions, and rules of conduct. The imperfections of study outside of Persia,
