Cultural historian Arnoud Visser found that know-it-alls have always been present, provoking resentment. They can be annoying, such as the colleague who corrects every detail, the guest who talks about themselves, or the online pedant who explains how things 'really' are.
Visser's research shows that know-it-alls have been a source of irritation in Western culture for centuries, from classical satire about smug philosophers to populist attacks on elitist academics.
They can irritate us as quickly as those who are actually corrupt or cruel.
Author's summary: Know-it-alls have been annoying people for centuries.