Demons are the Pagan Gods of Ancient Times

[Blaine91555]

Late to the party, but yes you can believe in demons and not in angels.  All sorts of old Mediterranean religions believed that bad things happened to good people because of demons -- but did not believe in angels or angel-spirits.  The demons (generally) weren't commanded by a god but just wandered around hurting people.

Bad vs good is pretty much universal, it seems to me. What represented good? What was the anti-demon?