American Rabbis. Secular leadership Following the Renaissance and the Enlightenment in Europe (with its Jewish "extension" the Haskalah movement, which led to much modern-day assimilation into the cultures of their native countries), the variety of Jewish practice grew, with a widespread adoption of secular values and life-styles. Many modern Jewish communities are served by a variety of secular organizations at the local, national, and international levels. These organizations have no official role in religious life, but often play an important part in the Jewish community. Most of the largest groups, such as Hadassah and the United Jewish Communities, have an elected leadership. No one secular group represents the entire Jewish community, and there is often significant internal debate among Jews about the stances these organizations take on affairs dealing with the Jewish community as a whole, such as antisemitism and Israeli policies. In the United States and Canada today, the mainly secular United Jewish Communities (UJC), formerly known as the United Jewish Appeal (UJA), represents over 150 Jewish Federations and 400 independent communities across North America. Every major American city has its local "Jewish Federation", and many have sophisticated community centers and provide services, mainly health care-related. They raise record sums of money for philanthropic and humanitarian causes in North America and Israel. Additional local organizations include Jewish Family Services, Jewish nursing homes and Jewish community foundations. Other organizations such as the Anti-Defamation League, American Jewish Congress, American Jewish Committee, and the B'nai B'rith represent different segments of the American Jewish community on a variety of issues. Karaite leadership A Karaite synagogue is run by a board of directors, and its spiritual leader is often called a Hakham, the equivalent of a "rabbi", and matches one in function. The Gabbai is the treasurer, the Shammash is the custodian, the Hazzan leads prayers, and in some the Ba'al Qeri'ah leads in the reading of the Torah. In America, Karaites are represented by the Karaite Jews of America, and in Israel they are represented. See also Rabbi Chief Rabbi Sanhedrin Biblical judges List of Jewish leaders in the Land of Israel Exilarch Kohen List of 21st-century religious leaders#Judaism References Leadership Jewish society