primitive religion

"Animal spirits" sounds like the latest show on the Discovery Channel or the basis of a primitive religion.

From The Wall Street Journal ● Mar. 27, 2012

At Michigan, for example, primitive religion is taught in anthropology classes, the background of the Bible in the Near Eastern studies program.

From Time Magazine Archive

To imitate such was the old Celtic religion as it was the primitive religion of most other peoples.

From The Celtic Magazine, Vol. 1, No. 3, January 1876 A Monthly Periodical Devoted to the Literature, History, Antiquities, Folk Lore, Traditions, and the Social and Material Interests of the Celt at Home and Abroad by Various

By this famous word taboo, of Polynesian origin, is to be understood a very important part of what I have called the protoplasm of primitive religion, and one closely allied both to magic and fetishism.

From The Religious Experience of the Roman People From the Earliest Times to the Age of Augustus by W. Warde Fowler

Now he was chiefly concerned with the Terranovans themselves—how they lived, what they thought, what sort of primitive religion they had, and so on.

From The Worshippers by Ed Emshwiller