Traditionalism, also known as the Traditionalist School, is a school of thought within perennial philosophy. Originating in the thought of René Guénon in the 20th century, it proposes that a single primordial, metaphysical truth forms the source for, and is shared by, all the major world religions. Unlike universalist forms of perennialism based on commonalities in religious experiences across cultures, Traditionalism posits a metaphysical unitary source known as Tradition which forms the basis for the major religions in their "orthodox" forms.
Tradition has exoteric and esoteric dimensions. The exoteric aspects of a tradition are primarily represented by its ceremonies, rituals, and rules, whereas the esoteric aspects are concerned with its spiritual and intellectual qualities. Traditionalists often confront "tradition" to "modernity". While "tradition" has a transcendent origin, "modernity" takes little or no account of this dimension. Traditionalists defend the transcendent dimension of reality that they see as inherent in traditional religious expressions and worldviews. In contrast, they view liberal and modernist expressions of these traditions with suspicion, seeing their foundations as rationalistic, materialistic and individualistic.