What are the motifs in Purity and Danger: An Analysis of Concepts of Pollution and Taboo by Mary Douglas?

Recurring idea are rituals and primitive religions. Douglas examines rituals as an inherent part of primitive religions. Primitive religions are less concerned with philosophy and more with material benefits, where ritual and moral conformity is employed. The religions that deal with rituals in an instrumental attract disbelief. Religions that deal with evil only in reference to demonology or sorcery are devoid of the reference to the entire universe. Religions are to deliver prosperity through ritual efficacy.