We think of psychopaths as killers, alien, outside society. But, you could have one for a colleague, a friend – or a spouse ...These people lack remorse and empathy and feel emotion only shallowly. In extreme cases, they might not care whether you live or die. These people are called psychopaths. Some of them are violent criminals, murderers. But by no means all. Professor Robert Hare is a criminal psychologist, and the creator of the PCL-R, a psychological assessment used to determine whether someone is a psychopath. “It stuns me, as much as it did when I started 40 years...