Cultural historian Arnoud Visser found that know-it-alls have always been present, provoking resentment.
Examples include colleagues who correct every detail, guests who talk excessively about themselves, and online pedants who explain how things "really" are.
Know-it-alls have been a source of irritation in Western culture for centuries, says Visser.
From classical satire about philosophers to populist attacks on academics, know-it-alls have been a longstanding annoyance.
Author's summary: Know-it-alls provoke deep irritation in many people.