ABSTRACT
Although it is Orthodox rabbis who prevail in the realm of the most influential rabbinical authorities, there has been a wide range of interesting personalities in the un-Orthodox Jewish environment who have contributed to the development of Jewish thinking in the twentieth century and the present. Non-Orthodox streams represent relatively new concepts within Judaism. Their origins lie in the period of the Jewish Enlightenment (haskalah), and nowadays most of their supporters are in the Anglo-Saxon Jewish world, mainly in the so-called Reform Judaism and the so-called Conservative Judaism.
