Dualism is the view that two fundamental concepts exist, which often oppose each other, such as good and evil, light and dark, or male and female. The word’s origin is the Latin dualis, meaning “two” (as an adjective).
Moral dualism
Moral dualism is the belief of the coexistence (in eastern and naturalistic religions) or conflict (in western [...]

Nondualism implies that things appear distinct while not being separate. The word’s origin is the Latin duo meaning “two” and is used as the English translation of the Sanskrit term advaita. The term can refer to a belief, condition, theory, practice, or quality.
Various usages
Nondualism may be viewed as the understanding or belief that dualism or [...]