As long as I can remember I have wondered why some people end up doing horrendous evil. How can a child raised by loving parents (perhaps just like mine) turn out to be so beastly in adult life. What exactly has to happen for these people to pull the evil trigger? One evening at a dinner party I sat next to a leading British psychiatrist. If anyone could answer my question it would be him. However when I asked him he gave the most disappointing answer: “sin.” That was all he said. How could the complexities of a criminal mind be traced to such a simple, singular root? Sin, of the kind the psychiatrist was talking about, is…