The Santaroga Barrier by Frank Herbert

A corporate psychologist is sent to probe a small, prosperous company town that seems unnaturally healthy, creative, and immune to outside influence. As he investigates, he uncovers a tightly knit culture reinforced by a local food and rituals that foster collective thinking and resist assimilation, creating a subtle but powerful social and biochemical barrier. Tensions rise as outside authorities and corporate interests clash with the town’s different values and methods, forcing the investigator to confront ethical questions about individuality, control, and the costs of conformity versus community.

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