 A critique of Geertz's model by Talal Asad categorized religion as "an anthropological category".Richard Niebuhr's (1894–1962) five-fold classification of the relationship between Christ and culture, however, indicates that religion and culture can be seen as two separate systems, though not without some interplay.One modern academic theory of religion, social constructionism, says that religion is a modern concept that suggests all spiritual practice and worship follows a model similar to the Abrahamic religions as an orientation system that helps to interpret reality and define human beings.