Judaism began in the ancient Near Eastern region of Canaan, among the people later known as Israel, and historically crystallized in the southern kingdom of Judah and its capital, Jerusalem. Over time, especially after the Babylonian exile in the 6th century BCE, this older Israelite religion developed into a more clearly defined, text‑centered Judaism rooted in the Torah and the community of Judah (Yehud).

Geographic starting point

  • The earliest roots of what became Judaism are traced to Canaan, a region that broadly overlaps with today’s Israel and Palestinian territories in the eastern Mediterranean.
  • Later, the faith took shape especially around the kingdom of Judah and the city of Jerusalem, which became the central place of the Temple and worship.

From Israelite religion to Judaism

  • Judaism grew out of the religion of ancient Israel, gradually emphasizing exclusive worship of one God (Yahweh) and a covenantal relationship with the people of Israel.
  • After the Babylonian conquest of Jerusalem (587/586 BCE) and the exile, returning communities in Persian‑period Judah (Yehud) rebuilt the Temple and organized religious life around the Torah, marking a key phase in the formation of Judaism.

When “Judaism” appears as a term

  • The English word “Judaism” ultimately comes from the Greek term “ioudaïsmos,” which first appears in the Hellenistic period (for example, in 2 Maccabees), referring to the way of life and religion of the people of Judah (the Ioudaioi).
  • This term reflects how the religion became associated not just with a land (Judah) but with a distinct community and way of life that could continue even outside that land.

Scholarly viewpoints on the “start”

  • Some scholars point to the Persian period (5th century BCE, time of Ezra and Nehemiah) as the moment Judaism, as a Torah‑based religion of Judah’s community, really “starts.”
  • Others argue that widespread, society‑level observance of Torah law may not have become common until the Hellenistic/Hasmonean period (2nd century BCE), even though the older Israelite religious traditions are much earlier.

Simple takeaway

  • Place: Ancient Canaan, especially later focused in Judah/Jerusalem.
  • Timeframe: Roots over 3,000 years ago in ancient Israelite religion, with “Judaism” as a distinct, Torah‑centered religion emerging between the exilic/post‑exilic Persian period and the later Hellenistic era.

Information gathered from public forums or data available on the internet and portrayed here.