Moral dualism is the philosophical concept that suggests the existence of two opposing moral forces or principles, often represented as good and evil. This idea posits that human actions and decisions can be categorized into these two distinct moral realms, influencing how individuals perceive right and wrong. In various cultures and religions, such as in the teachings of Zoroastrianism or the narratives of Christianity, moral dualism plays a significant role in understanding the struggle between these forces. It emphasizes the conflict between positive virtues and negative vices, shaping ethical frameworks and guiding moral behavior.