Ancient man was helpless victim of.  Crystallized by belief the dead would punish those who disdain rules by which they had lived.  Dependent on land-man ratio.  Grew out of effort to avoid pain and humiliation while seeking pleasure and power.  Have ample power to restrain sex urge.  Helped man subordinate present to future.  Human institutions are merely accumulated mores.  Laws in the making.  Mores change, but instinct never.  Mistake for evangelists to attempt to reform.  Origin of mores always unconscious and unintentional.  Prince’s staff did not impose mores upon tribes.  Safety brake against too rapid advancement. 
See also: UB 68:4.