"In ancient times, being deemed unacceptable by one’s tribe meant almost certain death (or at minimum an unpleasant life with little chance to procreate)."
How true...one of the Mysteries of life...I often remind myself "wait this will not kill me nor get me shunned, what's with all of the fight/flight hormones flooding into me? No sabretooth detected, chill out"
LOL...it's called thousands of years of primal instict buried into our subconscious.
In the end - "the only thing we have to fear is fear it's self" - President Roosevelt