Haskalah
The Jewish Enlightenment, Haskalah, began to take hold in Poland during the 19th century, stressing secular ideas and values. Champions of Haskalah, the Maskilim, pushed for assimilation and integration into Russian culture. At the same time, there was another school of Jewish thought that emphasized traditional study and a Jewish response to the ethical problems of anti-semitism and persecution, one form of which was the Musar movement. Though the Jews in the Pale were generally poorer and less educated than in other areas, they were still part of the debate over the future of Judaism in the 19th century.
Read more about this topic: History Of The Jews In 19th-century Poland