Pre-theistic

If we look at the controlling source of its virtue, the potentially sacred substance of the human body, and compare the earliest forms of consecration, we see that the theory of anointing leads us back to pre-theistic and even pre-fetishistic times.

Source: wiktionary

In order to demonstrate the pre-theistic or pre-deistic origin of religion from primitive simplicity, genealogical scholars elaborated a standard method of evolutionary stratification.

Source: wiktionary

"Though not jeopardizing the human status of its practitioners, however, the lowest, dream-related form of animism was categorically pretheistic in Tylor's scheme, merely furnishing the ground upon which gods would later develop".

Source: wiktionary