the amygdala, the part of the brain that should have anticipated the unpleasantness and sent the requisite signals of fear over to the central nervous

“Who is the unfeeling one?” I thought. “I only came here to hone my psychopath-spotting skills and this poor guy borrowed a special shirt.”

system, wasn’t functioning as it should.

“It’s as if both Midas and also the Queen of Narnia were here,” I said, “and the Queen of Narnia flew above a particularly fierce zoo and turned everything there to stone and then transported everything here.”

“So should we define him by his psychopathy or by his sanity?” I said. “Well, the people who say that kind of thing,” Bob said, “and I don’t use this in a pejorative way, are very left-wing, left-leaning academics. Who don’t like labels. Who don’t like talking about differences between people.”

could recognize all his sheep as individuals but couldn’t recognize human faces, not even his wife, not even himself in the mirror. The condition is called prosopagnosia— face blindness.

“You have to feel sorry for psychopaths, right? If it’s all because of their amygdalae? If it’s not their fault?” “Why should we feel sorry for them?” he replied. “They don’t give a shit about us.”

(You may be wondering what the difference is between a psychopath and a sociopath, and the answer is, there really isn’t one. Psychologists and psychiatrists around the world tend to use the terms interchangeably.)

“I’ve got a list of personality traits written down here that define psychopathy,” I said, pointing at my pocket. “Who the hell are the people who make the list?” said Al. “What are their names? I bet I never heard of them!”