The physical basis for sociopathy is approximately 50 percent inheritable, which sounds more dramatic than it probably is, because most personality characteristics that psychologists test for and study the genetics of are about 50 percent inheritable. Introversion, extroversion, it turns out that they're about 50 percent inheritable, which means that somehow sociopathy is physical, it's organic.

Sociopaths differ fairly dramatically in how their brains react to emotional words. An emotional word is love, hate, anger, mom, death, anything that we associate with an emotional reaction. We are wired to process those words more readily than neutral, nonemotional words. We are very emotional creatures. But sociopaths listen as evenly to emotional words as they do to lamp or book - there's no neurological difference.

If you have reached the point where you're certain that person has no conscience, or is in it to win rather than to love you, then the very best thing you can do is to get away. That's a very hard lesson to learn, and, furthermore, it's not always possible.

To learn to be charming is fairly easy - you can teach somebody to be charming and to learn human emotions - or to learn the behaviors that go with human emotions. A sociopath, a smart one, will study the way we emote, and will learn how to do that quite effectively.

Sociopaths are just like everybody else in that some of them are really brilliant, some of them are really stupid, and most of them are somewhere in between.

The reason I want to explain that you're probably never going to get revenge a sociopath and you're also probably not going to redeem this person, is that it is not a project that will ever succeed. At present, if a person does not have a conscience, we know of no way to instill one - not even a little bit. It's not like something you can take off the shelf and put into somebody's brain. It makes me so sad to hear people say, "I think I can see just a little bit of a conscience."

Some parts of the population are starting to realize that character is extremely important and that it cannot be measured by the things we like to measure it by: the tabloids and so forth. Character is crucially important to a leader, to be a moral leader, and we'd better make it primary on our list or we're going to keep getting more of the same.