Today, Fallon believes that the genetics are there, true, but that certain critical periods in your childhood can nudge you more or less toward full-blown clinical psychopathy, so you exhibit some signs, for instance, but not the whole arsenal. Luck out, you become a high-functioning psychopath, like Fallon, and, perhaps, some of the con artists in this book. Get the bad draw, you become a violent psychopath, like the ones who fill up jails and sit on death row.
