traditionalism

(countable, uncountable) The adherence to traditional views or practices, especially with regard to cultural or religious matters.
(countable, uncountable) The continuation of theological rituals on the basis that the ritual has always completed, rather than the ritual being a manifestation of theology.
(countable, uncountable) A philosophical system which makes tradition the supreme criterion and rule of certitude; the doctrine that human reason is of itself radically unable to know with certainty any truth or, at least, the fundamental truths of the metaphysical, moral, and religious order.