Have you ever had one of those relationships from hell, where a person seems to not care about anything or anyone other than himself? Well, there’s a term that might fit that crazy person you ran away from years ago. The term of sociopath. Basically, a sociopath doesn’t really feel emotion and just kinda makes decisions that are focused on what’s best for him/her without considering how you might feel or whether the decision might hurt other people. Many politicians fit into this category.
This video describes the sociopathic tendency. Maybe you’ll find that you have an ex who fits in this category.