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the difference seems to be that cult hierarchies promise upward movement closer to the "sun". e.g. if you join as a "poor victim" and the existing members are the "brave saviors" then to become a savior yourself you need a new victim. otherwise you are stuck in the victim role
this is different than a family/community which is also hierarchical because you don't strive to replace the mother/father/elder, nor do you fight with your siblings to see who is loved more (in a healthy family)
