Narcissism has become the armchair diagnosis of the decade. Social media is awash with people flinging the label around. Everyone’s ex seems to be a narcissist, some of our parents are under suspicion ...

During former President Donald Trump’s campaign and presidency, the word narcissism became something of a buzzword. And in recent years the word has been popularized on social media and in the press.

If a narcissist’s personal code of conduct were consistent, far fewer individuals close to them would feel the need to seek out self-help resources to cope. Prior to explaining how a narcissist’s ...