Haredi Judaism
Haredi Judaism is not an institutionally cohesive or homogeneous group, but comprises a diversity of spiritual and cultural orientations, generally divided into a broad range of Hasidic sects, Litvishe-Yeshivish streams from Eastern Europe, and Oriental Sephardic Haredim. These groups often differ significantly from one another in their specific ideologies and lifestyles, as well as the degree of stringency in religious practice, rigidity of religious philosophy, and isolation from the general culture that they maintain.
History of the Jews in the United States
On a theological level, American Jews are divided into a number of Jewish denominations, of which the most numerous are Reform Judaism, Conservative Judaism and Orthodox Judaism. However, roughly 25% of American Jews are unaffiliated with any denomination. Conservative Judaism arose in America and Reform Judaism was founded in Germany and popularized by American Jews.