History & Origins
Judaism is among the oldest still-practiced religions in human history, emerging from the Ancient Near East and tracing its origins to the patriarchal narratives of Abraham, Isaac, and Jacob, and to the covenant established at Sinai under Moses.
The tradition's recorded history spans more than three thousand years, encompassing the rise and fall of the Israelite monarchies, the catastrophic destruction of the First and Second Temples, centuries of diaspora, and the modern renewal of a Jewish national homeland in the State of Israel. Throughout these upheavals, Judaism has demonstrated remarkable adaptability, transforming itself without sacrificing continuity of identity or practice.
The foundational event in Jewish historical consciousness is the Exodus from Egypt and the subsequent revelation at Mount Sinai, where, according to tradition, God gave Moses the Torah — both the Written Law (the Five Books of Moses) and, in rabbinic understanding, an Oral Law to accompany it. This covenant relationship between God and the people of Israel became the defining theological and social structure of Jewish life.
"Hear, O Israel: the Lord is our God, the Lord is One."
Deuteronomy 6:4 — The Shema, the central affirmation of Jewish faithThe destruction of the First Temple in Jerusalem by Babylonia in 586 BCE initiated the first major diaspora. The return from Babylon and the construction of the Second Temple under Ezra and Nehemiah (c. 516 BCE) marked a new phase characterized by heightened emphasis on textual study and legal observance. The Second Temple period (516 BCE–70 CE) witnessed the emergence of diverse Jewish sects — Pharisees, Sadducees, Essenes, and others — each interpreting the inherited tradition in distinctive ways.
The Roman destruction of the Second Temple in 70 CE was the pivot upon which all subsequent Judaism turned. With the Temple gone and sacrificial worship no longer possible, the Pharisaic tradition — centered on Torah study, prayer, and rabbinic interpretation — became the dominant and eventually the defining form of Jewish life. The great academies of learning in the Land of Israel and Babylon produced the Mishnah, the two Talmuds, and a vast literature of biblical commentary, guiding Jewish communities dispersed across three continents.
The medieval period brought both flourishing philosophical and mystical creativity — figures such as Maimonides, Rashi, and the Kabbalists of Spain and Safed — and intense persecution culminating in the Crusades, the Spanish Expulsion of 1492, and waves of pogrom violence. The Enlightenment era (18th–19th centuries) introduced new questions of Jewish identity in relation to modernity, producing the major denominational movements that structure Jewish life today. The Shoah (Holocaust), in which six million Jews were systematically murdered by the Nazi regime, represents the defining catastrophe of modern Jewish history, reshaping Jewish theology, identity, and the case for Zionism.
Core Beliefs & Theology
Judaism is a strictly monotheistic tradition. Its theology centers on the singular, incorporeal, eternal God — identified by the four-letter Hebrew name YHWH — who created the universe, acts in history, and entered into a special covenant with the Jewish people.
Unlike Christianity, Judaism does not hold to a doctrine of the Trinity, and unlike Islam, it does not have a single authoritative creed binding upon all adherents. The closest thing to a formal statement of faith is Maimonides' Thirteen Principles of Faith (12th century), which, though not universally binding, has exerted enormous influence on Jewish thought.
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IMonotheism — The Oneness of God
God is one, indivisible, and without partner or equal. This radical monotheism (expressed in the Shema prayer) is the bedrock of all Jewish theology. God is incorporeal, beyond human comprehension, and yet personally involved in the affairs of human history.
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IIThe Covenant (Brit)
God entered into a unique, unconditional covenant with Abraham and his descendants, promising them blessing, land, and a distinctive role in human history. A second covenant was established at Sinai with the entire Israelite people, binding them to the Torah's commandments. Jewish existence is understood through this covenantal framework.
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IIITorah as Divine Revelation
The Torah (at minimum the Five Books of Moses; in a broader sense, the entire Hebrew Bible and rabbinic tradition) is understood as God's revealed will. The Written Torah is paired with the Oral Torah — the body of interpretation transmitted from Sinai and eventually codified in the Mishnah and Talmud. Adherence to Torah law (halakha) is the primary religious obligation of Jews.
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IVChosenness (Am Segulah)
Jews understand themselves as a "chosen people" — not as a claim of superiority, but as the particular people entrusted with the Torah and its commandments, bearing a specific covenantal responsibility. This concept has been interpreted across a wide spectrum, from literal election to a metaphor for ethical vocation.
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VMessianism and the World to Come
Classical Jewish theology anticipates the coming of the Messiah (Mashiach), a human king from the Davidic line who will usher in an era of universal peace, rebuild the Temple, and restore Jewish sovereignty in Israel. Jewish eschatology also includes the Olam Ha-Ba (World to Come) and the resurrection of the dead, though these doctrines are developed more fully in rabbinic than in biblical literature.
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VIEthical Monotheism and Tikkun Olam
Jewish theology is characterized by an insistence that proper religious life is inseparable from ethical conduct. The concept of Tikkun Olam ("repair of the world") — rooted in Kabbalistic thought and widely adopted in liberal Judaism — holds that human beings are partners with God in the ongoing perfection of creation. Social justice is understood as a religious obligation, not merely a civic virtue.
The 613 Commandments (Mitzvot)
The rabbinic tradition counts 613 commandments (mitzvot) in the Torah — 248 positive ("do") commandments and 365 negative ("do not") commandments. These encompass areas of prayer, dietary law, Sabbath observance, business ethics, agricultural practice, family purity, and more. The body of laws derived from these commandments and developed through subsequent interpretation constitutes halakha (Jewish law), which continues to govern Orthodox Jewish life in comprehensive detail.
Kabbalah and Jewish Mysticism
Running alongside the rationalist philosophical tradition (represented most fully by Maimonides) is a rich mystical current known as Kabbalah. Originating in 12th-century Provence and flowering in 16th-century Safed under Isaac Luria and others, Kabbalah offers an esoteric account of God's inner life (via the doctrine of the sefirot, or divine emanations), the nature of the human soul, and the cosmic significance of ritual observance. The 13th-century text Zohar is the central canonical text of this tradition. Hasidism (founded in 18th-century Eastern Europe) brought Kabbalistic ideas into a popular movement emphasizing joy, prayer, and the accessibility of divine connection for all people.
Sacred Texts
Jewish textual tradition is one of the richest and most continuous in human history. At its foundation is the Tanakh — the Hebrew Bible — supplemented by millennia of legal, exegetical, philosophical, and mystical literature.
Liturgical Texts
The Siddur (prayer book) contains the fixed liturgy of daily, Sabbath, and festival worship. The Haggadah narrates the Passover seder. The High Holiday Machzor contains the liturgy for Rosh Hashanah and Yom Kippur. These texts, while not scripture, are central to lived Jewish practice and have accumulated centuries of commentary and creative addition.
Key Figures
Jewish history spans millennia and encompasses figures whose influence extends far beyond the tradition itself — patriarchs and matriarchs, prophets, rabbis, philosophers, and mystics who shaped not only Judaism but the broader Western religious world.
Practices & Observances
Jewish religious practice is comprehensive and life-encompassing, governing daily routines, diet, the weekly cycle, the annual calendar, and the major transitions of human life from birth to death.
The weekly day of rest from sundown Friday to nightfall Saturday is the most important Jewish observance. Shabbat commemorates God's rest after creation (Genesis 2) and Israel's liberation from Egyptian slavery. Observance involves lighting two candles, reciting Kiddush over wine, eating three festive meals, refraining from 39 categories of creative labor (including writing, cooking, and kindling fire), synagogue attendance, and study. It is described in Halachah as a "foretaste of the World to Come."
The daily liturgy consists of three prayer services: Shacharit (morning), Mincha (afternoon), and Maariv (evening). These replace the Temple sacrifices and center on the Amidah (Standing Prayer), a sequence of 19 blessings. Prayer is ideally conducted in a minyan (quorum of ten adult Jews). On Shabbat and festivals, a fourth service, Musaf, is added. Observant men wear a tallit (prayer shawl) and tefillin (phylacteries) during morning prayer.
Jewish dietary law governs which foods may be eaten and how they must be prepared. Permitted (kosher) land animals must chew their cud and have split hooves; permitted seafood must have fins and scales. Pork and shellfish are forbidden. Meat and dairy may not be mixed. Animals must be slaughtered by a trained ritual slaughterer (shochet) in a manner designed to minimize suffering. Food must be certified kosher for observant Jews. The laws derive from Leviticus, Deuteronomy, and extensive rabbinic elaboration.
The study of Torah is itself a religious act of the highest order — equivalent, according to the Talmud, to the performance of all other commandments combined. Jewish men have traditionally been expected to dedicate significant time to daily study. The practice of studying a page of Talmud daily (Daf Yomi), introduced in 1923, completes the entire Babylonian Talmud in approximately 7.5 years and now involves hundreds of thousands of participants worldwide.
The most solemn period of the Jewish year runs from Rosh Hashanah (New Year) through Yom Kippur (Day of Atonement), ten days later. Rosh Hashanah is marked by the sounding of the shofar (ram's horn) and liturgy emphasizing God's kingship and judgment. Yom Kippur is a full 25-hour fast involving five prayer services and liturgy of collective confession and atonement. These days are observed by a larger proportion of Jews than any other observance.
An eight-day (seven in Israel) spring festival commemorating the Exodus from Egypt. Its central observance is the seder — a ritual meal whose order (seder means "order") is prescribed by the Haggadah text. The seder involves retelling the Exodus narrative, eating symbolic foods (matzah, bitter herbs, charoset), drinking four cups of wine, and posing and answering the Four Questions. All leavened products (chametz) are removed from the home for the festival's duration.
Male children are circumcised on the eighth day of life in fulfillment of the covenantal commandment given to Abraham (Genesis 17). The ceremony is performed by a trained mohel and is typically a festive family occasion. It is understood as the physical sign of the covenant between God and Abraham's descendants, and remains one of the most universally observed Jewish practices across all denominations.
At age 13 (boys) or 12–13 (girls, depending on denomination), a Jewish young person becomes obligated to observe the commandments. The rite of passage typically involves chanting a portion of the Torah aloud in the synagogue (the bar/bat mitzvah's first public performance of this duty), delivering a brief teaching, and a festive celebration. Bar mitzvah as a formal ceremony dates to medieval Germany; bat mitzvah was introduced in modern times.
Major Branches & Movements
Modern Judaism is divided into several major movements that emerged primarily in response to 18th- and 19th-century European modernity and the challenges of Enlightenment thought to traditional practice and belief.
Maintains that the Torah — both written and oral — is the literal word of God, and that halakha as developed through rabbinic tradition is eternally binding and non-negotiable. Orthodox communities range from the relatively open Modern Orthodox (who engage with secular culture) to the more insular Haredi ("ultra-Orthodox") communities who minimize engagement with modernity. Gender roles in Orthodox life are typically traditional; men and women pray separately (mechitza).
Also called Masorti (Traditional) outside North America. Conservative Judaism affirms the binding nature of halakha while accepting that the oral tradition has evolved historically and may continue to evolve in response to new circumstances. It accepts modern biblical scholarship as compatible with faith and, depending on the congregation and the Committee on Jewish Law and Standards ruling, permits ordination of women, allows driving to synagogue on Shabbat, and recognizes egalitarian worship.
Emerged in early 19th-century Germany in response to emancipation and Enlightenment. Reform Judaism regards the moral and ethical dimensions of Judaism as primary, while viewing ritual law as non-binding — though practitioners may choose to observe any or all traditional practices. Services are typically conducted largely in the vernacular, egalitarian, and musically modernized. Reform is strongly associated with progressive social ethics as an expression of Jewish values.
Founded by Rabbi Mordecai Kaplan in the 20th century, Reconstructionism views Judaism as an evolving religious civilization — not primarily as a revealed religion but as the total cultural, social, and spiritual expression of the Jewish people. God is reinterpreted in naturalistic, non-supernatural terms. Halakha is viewed as "having a vote but not a veto." Reconstructionism was the first movement to ordain women (1968) and to accept interfaith families fully.
A mystical revivalist movement founded by the Baal Shem Tov (Rabbi Israel ben Eliezer, c. 1700–1760) in 18th-century Ukraine. Hasidism emphasized the accessibility of God to all — not only the learned scholar but also the simple person — through prayer offered with intense devotion and joy (simcha). It is organized around charismatic spiritual leaders (Rebbes), many of whose dynasties survive today. Chabad-Lubavitch is the most widely recognized Hasidic movement globally.
These ethnic-liturgical categories, while not denominations, represent a major divide in Jewish life. Sephardic Jews descend from communities expelled from the Iberian Peninsula in 1492; Mizrahi Jews are from Middle Eastern, North African, and Central Asian communities. Both groups follow distinct prayer rites, legal traditions, and cultural practices. Most follow Sephardic halakha as codified by Rabbi Joseph Karo in the Shulchan Aruch, without the Ashkenazic glosses of Moses Isserles.
Glossary of Key Terms
A reference guide to essential Hebrew and Aramaic terms in Jewish theology, law, and practice.
In its narrowest sense, the Five Books of Moses. More broadly, the entire Hebrew Bible; still more broadly, the totality of Jewish teaching including the Oral Law, Talmud, and all subsequent rabbinic literature. The concept is flexible: "It is a tree of life to those who hold fast to it" (Proverbs 3:18).
Jewish law as a living, binding system — encompassing biblical commandments, rabbinic legislation, and customary practice. Derived from the root meaning "to walk," it signifies the path one follows in life. Halakha governs virtually every dimension of observant Jewish life.
A divine commandment. The rabbis count 613 mitzvot in the Torah. In colloquial usage, "mitzvah" has also come to mean a good deed. Performing mitzvot is the primary religious obligation in Judaism; they sanctify ordinary life and express the covenantal relationship between God and Israel.
The process of return to God through sincere repentance. Teshuvah involves recognizing one's transgression, regretting it sincerely, verbally confessing it before God, making restitution to those harmed, and resolving not to repeat the act. It is the central spiritual act of the High Holy Day season and is available at all times.
The manifest presence of God in the world, particularly associated with specific sacred spaces (the Tabernacle, the Temple) and with righteous human beings. In Kabbalistic thought, the Shekhinah is the feminine dimension of God's presence and is associated with the tenth sefirah (divine emanation). In exile, the Shekhinah is said to accompany the Jewish people.
The Jewish concept of the afterlife or messianic future. Rabbinic sources are deliberately vague about its precise nature — "No eye has seen it but God" (Talmud, Berakhot 34b) — but generally include the resurrection of the dead, divine judgment, and a state of reward for the righteous. It is distinguished from both the Messianic Era (an earthly future) and the Garden of Eden (the immediate afterlife).
Originally a Kabbalistic term referring to the cosmic repair of divine sparks scattered at creation (Lurianic cosmology). In contemporary Jewish thought, particularly Reform and Conservative movements, the phrase has been adopted to describe social justice work as a religious obligation — the human task of partnering with God to perfect the world.
A quorum of ten adult Jews required for certain communal prayers, including the recitation of Kaddish, Torah reading, and the full repetition of the Amidah. In Orthodox tradition, only adult males count toward a minyan; Reform, Conservative, and Reconstructionist movements count adult women equally. The requirement reflects Judaism's fundamentally communal — not merely individual — conception of religious life.
The central declaration of Jewish faith, drawn from Deuteronomy 6:4–9, 11:13–21, and Numbers 15:37–41. Its opening words — "Hear, O Israel: the Lord is our God, the Lord is One" — are recited morning and evening, and are among the last words a Jew is ideally to utter before death. The Shema affirms the absolute unity and uniqueness of God.
The ritual circumcision of male infants on the eighth day of life, instituted in Genesis 17 as the physical sign of the covenant between God and Abraham. Performed by a trained mohel, it is one of the most universally observed Jewish commandments. In traditional thought, failure to observe brit milah constitutes a severance of one's connection to the covenant community.
Often translated as "charity," tzedakah is better understood as obligatory giving to those in need — an act of justice, not voluntary generosity. Maimonides described eight levels of tzedakah, the highest being anonymous giving that enables the recipient to become self-sufficient. Jewish law specifies that one should give between 10% and 20% of net income to those in need.
The system of Jewish dietary laws determining which foods are permitted (kosher, "fit") and which are forbidden (treif, "torn"). The laws derive from the Torah (Leviticus 11, Deuteronomy 14) and encompass which animals may be eaten, proper slaughter methods, and the prohibition on mixing meat and dairy. Kashrut has served throughout history as a marker of Jewish identity and communal distinctiveness.