Fear of not having food, shelter, safety. Fear of death. Fear is survival. Fear provides a primal urge to find food, shelter, safety.
Fear of judgment, rejection, separation. May not be a physical death but all too real. Rebuke. Disappointment. Exile. Banishment. Embarrassment. Outcast. Shame. Guilt. Blame.
Judged, rejected, separated from the tribe. Deemed not worthy. This fear also provides a primal urge, still a survival mechanism. But gives rise to something else… gives rise to the Ego.