Zoroastrianism A more dualistic picture: the good creation of Ahura Mazda is invaded and mixed with evil by Angra Mainyu (Ahriman). The world becomes a battleground of light and darkness. Human beings participate in the struggle to purify and restore the world.
Manichaeism An extreme dualism: particles of pure Light are trapped in Darkness through a primordial cosmic battle. The human task is to liberate the light within through strict asceticism and knowledge.