Oscar Wilde famously noted, “Some cause happiness wherever they go; others, whenever they go.” It is arguably one of the best brief illustrations of emotional intelligence (EQ), a trait that became popular thanks to a nonacademic best-selling book by journalist Daniel Goleman, in which he insinuated that EQ is a more important driver of success than IQ (a claim that has been discredited).

And yet, there’s no shortage of evidence for the importance of EQ when it........

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