What are the main traits?

Get him mentally evaluated. If he is actually a sociopath then his feelings may be hurt but who cares? It's not like he cares about yours or anybody else's. If it turns out he isn't a sociopath, then obviously you only noticed this because his behavior bothers you and him need to work on your relationship.

1 in 3 people have sociopathic tendencies. Some are innate and some are nurtured. It's all how people demonstrate these abilities. Some of the tendencies are actually focused based and make people better at their jobs. They are not all crazy murderers.

It's a strange disorder, like most other personality disorders. Any normal person can have the traits and still not be a sociopath (or any other social/personality disorder.) Don't take it seriously, and don't confront him about it. If he hasn't been a big enough problem that you actually got engaged to him, then it's fine.

This is only a FML if you still marry him. You still have a choice.

Don't marry him if you have a bad feeling about it. Sociopaths don't care about anybody but themselves. No conscience, only see Their point of view. Doesn't sound like good husband material if he has those traits.

I actually heard a hypothetical situation that can let you know if someone, at the very least suffers from sociopathic tendencies. It starts out with a man and his little sister going to their parents funeral. He then looks across the casket, and his eyes meet with a woman standing across from him. She then walks over to him and gives her condolences, and he offers her a ride home. Later that night she kills his little sister. Why? She killed her because she would get to see him again at his sisters funeral. But I agree with everyone else, you shouldn't diagnose her by yourself. Let a professional do it.

Sociopath does not = homicidal psychopath.

Sociopaths don't always kill. While they are very manipulative and cunning and feel no remorse for what they did, a very small percentage actually do kill people.

So he has... GLIB and SUPERFICIAL CHARM GRANDIOSE SELF-WORTH NEED FOR STIMULATION or PRONENESS TO BOREDOM PATHOLOGICAL LYING CONNING AND MANIPULATIVENESS LACK OF REMORSE OR GUILT SHALLOW AFFECT CALLOUSNESS and LACK OF EMPATHY PARASITIC LIFESTYLE POOR BEHAVIORAL CONTROLS PROMISCUOUS SEXUAL BEHAVIOR EARLY BEHAVIOR PROBLEMS LACK OF REALISTIC, LONG-TERM GOALS IMPULSIVITY IRRESPONSIBILITY FAILURE TO ACCEPT RESPONSIBILITY FOR OWN ACTIONS MANY SHORT-TERM MARITAL RELATIONSHIPS JUVENILE DELINQUENCY REVOCATION OF CONDITION RELEASE CRIMINAL VERSATILITY ... how and why are you still with him