During the Stone Ages, women were more range restricted by their youngest child and thus gathered predominantly stationary food objects, men were less range restricted and searched for cadavers and in later times hunted moving animals. Brain organization seems to be dimorphic in this respect, as the research by Doreen Kimura of Canada shows. The problem with this explanation is the missing link between spatial and verbal sex differences and parapsychic phenomena. This hypothesis is somethimes taken to explain womens' superiority in deciphering and employing nonverbal cues. Their brain processes more holistic than mens' brains.
Hypothesis is too unspecific.
If we view religiosity as one of various subtypes of spirituality, this heritability invites an evolutionary explanation.