Dualism (Indian philosophy)
Dualism in Indian philosophy refers to the belief held by certain schools of Indian philosophy that reality is fundamentally composed of two parts. This mainly takes the form of either mind-matter dualism in Buddhist philosophy or consciousness-matter dualism in the Samkhya and Yoga schools of Hindu philosophy. These can be contrasted with mind-body dualism in Western philosophy of mind, but also have similarities with it.
Kabbalah
Although Kabbalah propounds the Unity of God, one of the most serious and sustained criticisms is that it may lead away from monotheism, and instead promote dualism, the belief that there is a supernatural counterpart to God. The dualistic system holds that there is a good power versus an evil power. There are two primary models of Gnostic-dualistic cosmology: the first, which goes back to Zoroastrianism, believes creation is ontologically divided between good and evil forces; the second, found largely in Greco-Roman metaphysics like Neo-Platonism, argues that the universe knew a primordial harmony, but that a cosmic disruption yielded a second, evil dimension to reality. This second model influenced the cosmology of the Kabbalah.