I've heard it claimed more than once that animals simply act on instinct. Apes are great at dashing that notion - in this case using stone tools!
Originally Posted by rstones199
"The relevance of the brain's ventromedial dopaminergic systems to religious experience, belief and behavior is suggested by several lines of evidence, including the fact that a variety of clinical conditions related to dopaminergic dysfunction—mania, obsessive-compulsive disorder (OCD), schizophrenia, and temporal-lobe epilepsy—are regularly associated with Hyper-Religiosity."
-- from "The Neural Correlates of Religious and Nonreligious Belief" by Sam Harris et al.