Zoroastrianism

The first war of light against darkness. Every secret doctrine since is a footnote.

Zoroastrianism introduced cosmic dualism — a good creator opposed by a lying destroyer, judgment, saviors, resurrection — ideas that flowed into Second Temple Judaism, Christianity, and Gnosticism. It sits in the web as the doctrinal headwater: the first system where history is a war between light and darkness, which is the emotional architecture of conspiracy thinking itself.