How to spot a psychopath: ‘It’s like the difference between a domestic cat and a wild cat’

<p>People with persistent predatory personalities cause an inordinate amount of pain.

Recently, our shared understanding of them has grown – and it could help protect us</p><p>The classic checklist for psychopathy was developed in 1980 by Prof Robert Hare, who is still the recognised giant of the territory. The 20 traits, which ranged from pathological lying to a lack of empathy, were based entirely on prison populations. This worked because not only did Hare have the benefit of a large sample, with pronounced…