A devil (from Greek: διάβολος diábolos “slanderer, accuser”) is the personification and archetype of evil in various cultures. Historically, devils can be defined as personifications of whatever is perceived in society as evil and the depiction consists of its cultural traditions.In Christianity, the manifestation of the Devil is Satan; the primary opponent of God. While in Christianity, the Devil was created by God, in dualistic cosmologies, the Devil is seen as an independent principle besides the good God. Proponents of such dualism can be found in Zoroastrism, Manichaeism, Albanenses and partly in Catharism. Some other religious and philosophical views, like Thomism, Kabbalah, Bahaism, Sufism and Ahmadiyya, hold that evil has no ontological existence and is regarded as something illusory.
In religious history, a set of gods often become deposed by a younger generation of deities, and later become considered evil. The Titans were replaced by the Olympic gods, the Teutonic gods demonized the Giants, the Roman and Greek deities became devils in Christianity, and in Islam, the pre-Islamic Jinn were reduced from tutelary deities to beings subject to the judgment of the Islamic deity and if they do not submit to his law, are regarded as demons.