The high intellectual level of the Polish Jews was the result of their relative economic prosperity. As for the character of their mental productivity, it was the direct outcome of their social autonomy. The vast system of Kahal self-government enhanced not only the authority of the rabbi, but also that of the learned Talmudist and of every layman familiar with Jewish law. The rabbi discharged, within the limits of his community, the functions of spiritual guide, head of the yeshibah, and inspector of elementary schools, as well as those of legislator and judge. An acquaintance with the vast and complicated Talmudic law was to a certain extent necessary even for the layman who occupied the office of an elder (_parnas_, or _rosh-ha-Kahal_), or was in some way connected with the scheme of Jewish self-government. For the enactments of the Talmud regulated the inner life of the Polish Jews in the same way as they had done formerly in Babylonia, in the time of the autonomous Exilarchs and Gaons. But it must be remembered that, since the times of the Gaons, Jewish law had been considerably amplified, Rabbinic Judaism having been superimposed upon Talmudic Judaism. This mass of religious lore, which had been accumulating for centuries, now monopolized the minds of all educated Jews in the empire of Poland, which thus became a second Babylonia. It reigned supreme in the synagogues, the yeshibahs, and the elementary schools. It gave tone to social and domestic life. It spoke through the mouth of the judge, the administrator, and the communal leader. Lastly it determined the content of Jewish literary productivity. Polish-Jewish literature was almost exclusively consecrated to rabbinic law. The beginnings of Talmudic learning in Poland can be traced back to the first half of the sixteenth century. It had been carried thither from neighboring Bohemia, primarily from the school of the originator of the pilpul method, Jacob Pollack.[86] A pupil of the latter, Rabbi Shalom Shakhna (ab. 1500-1558), is regarded as one of the pioneers of Polish Talmudism. All we know about his fortunes is that he lived and died in Lublin, that in 1541 he was confirmed by a decree of King Sigismund I. in the office of chief rabbi of Little Poland, and that he stood at the head of the yeshibah which sent forth the rabbinical celebrities of the following generation.[87] It is quite probable that the rabbinical conferences of Lublin, which afterwards led to the formation of the "Council of the Four Lands," owe their inception to the initiative of Rabbi Shakhna. After his death his son Israel succeeded to the post of chief rabbi in Lublin. But it was a pupil of Shakhna, Moses Isserles, known in literature by the abbreviated name of ReMO (1520-1572),[88] who became famous throughout the entire Jewish world.