For more than two millennia, a group of closely related religions has developed in Central Asia. Today in popular culture almost nothing is left of them. All of them are connected with each other by a common origin, a view, a common tradition.

At the center of these religions is dualism, the conflict of light and darkness, the struggle of two rigidly opposed principles. We are going to talk about Zoroastrianism, Manichaeism and Cathars.