There's the old debate, going back historically to the roots of dualism, in the ancient near east, where the Mithraists created the first religion (that we know of) around the dualistic concept of the world as a battleground between Good and Evil. There's a difference between a world of that sort of absolute duality, and the simple fact that so much of our world is structured as dichotomies; Night and Day, Man and Woman, Old and Young, Left and Right... We tend to perceive things as paired... Sign in to see full entry.