Judaism
Around the 1st century CE, there were several small Jewish sects: the Pharisees, Sadducees, Zealots, Essenes, and Christians. After the destruction of the Second Temple in 70 CE, these sects vanished. Christianity survived, but by breaking with Judaism and becoming a separate religion; the Pharisees survived but in the form of Rabbinic Judaism (today, known simply as "Judaism"). The Sadducees rejected the divine inspiration of the Prophets and the Writings, relying only on the Torah as divinely inspired. Consequently, a number of other core tenets of the Pharisees' belief system (which became the basis for modern Judaism), were also dismissed by the Sadducees. (The Samaritans practiced a similar religion, which is traditionally considered separate from Judaism.)
Haredi Judaism
The chief political division among Haredim has been in their approach to the State of Israel. While ideologically non-Zionist, the United Torah Judaism alliance comprising Agudat Yisrael and Degel HaTorah (and the umbrella organizations World Agudath Israel and Agudath Israel of America) represent a moderate and pragmatic stance of cooperation with the State of Israel, and participation in the political system. UTJ has been a participant in numerous coalition governments, seeking to influence state and society in a more religious direction and maintain welfare and religious funding policies. Haredim who are more stridently anti-Zionist are under the umbrella of Edah HaChareidis, who reject participation in politics and state funding of its affiliated institutions, in contradistinction to Agudah-affiliated institutions. Neturei Karta is a very small activist organization of anti-Zionist Haredim, whose controversial activities have been strongly condemned, including by other anti-Zionist Haredim. Neither main political party has the support in numbers to elect a majority government, and so, they both rely on support from the Haredi parties.