The central trait of sociopathy is a complete lack of conscience, which is very difficult for most people to get their heads around, because those of us who do have a conscience can't really imagine what it would be like if we didn't. Most people think that deep down everybody has a conscience, and it turns out that's just not true.

If you don't have a conscience, what is your behavior like? Apparently, if you don't have a conscience, if you don't really . . . love, then the only thing that's left for you is the game - it's about controlling things.

Usually sociopaths will look down upon us for that very reason - that we're gullible. We're weak. One person told me that he thought he was the only honest person because he would admit that he didn't have a conscience and everybody else was clearly faking it.

Even famous people - are most concerned of all with what people who are close to them think. And the sociopath is generally not concerned with that at all.

The sociopath wants the person to be easily enough fooled to stick with him. This can be accomplished by looking for someone who is very, very loyal. Most of us consider loyalty to be a very positive trait - and it is a positive trait. But it also blinds people to some of the traits of the person they're loyal to.

I would hesitate to tell people to stop being kind or sympathetic to sociopath. But just like loyalty, some things that can be taken advantage of are empathy, sympathy, and our tendency to pity somebody when something has gone wrong in their life.

The bottom line for most people who are normal is their need for other people. Even the greedy ones have this need - as long as they're not sociopathic. They may be very misguided and unhappy and do bad things and so forth, but in general if you look down deep, you find that these people are mainly concerned with other people and what other people think of them.