Why Groupthink Never Went Away

First identified in the 1970s, our capacity for flawed decision-making is unchanged

Members of Fidel Castro’s militia in the Escambry Mountain area of Cuba in 1961 during the ill-fated US-backed Bay of Pigs invasion. Photo: Three Lions/Getty Images

By Andrew Hill

The psychologist who did most to publicise the theory of groupthink would have turned 100 this month.

Astonishingly, it is nearly half a century since Irving Janis published the study that detected…

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