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

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

What had been a primitive religion had become an established church.

From Behind the Mirrors The Psychology of Disintegration at Washington by Clinton W. (Clinton Wallace) Gilbert

I think it was the writings of my friend Mr. Andrew Lang that first awoke me, in my undergraduate days, to the importance of anthropology and primitive religion to a Greek scholar.

From Five Stages of Greek Religion by Gilbert Murray