Besides the things you listed one might consider that some folks we're uneducated. And being uneducated means you may have to rely on the
honesty of others. Sad to say I have met people who fall into that category and due to no fault of their own they become victims of every sort of folly.

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"What you hear in a great jazz band is the sound of democracy. “The jazz band works best when participation is shaped by intelligent communication.”
Harmony happens whenever different parts get to form a whole by means of congruity, concord, symetry, consistency, conformity, correspondence, agreement, accord, unity, consonance…….