Spin: Anthroplogist's dreamy eyed fuzz brained imaginations of idealitic socialistic-sexual uptopian existance. Remember Mz. Mead and her fantasies.
Reality 2: Some filmaking anthropologists have a film to sell and reputations to make for the speaking and seminar circuit. This kind of poisonous mush, being as it advocates "stone aged near-animals are better than theat horrid evil white man" sells. That it deconstructs marriage and monogamy even better entre to the market.
Reality 3: Another product of the Canela Indian franchise (TM). Serving fuzz brains hack-a-demics and touristas for over thirty years.