According to Dr. Martha Stout in her thought-provoking book, The Sociopath Next Door: “About one in twenty-five individuals are sociopathic, meaning, essentially, that they do not have a conscience.” The Sociopaths are roaming among us and they do not have a label on their head saying they are sociopaths. They could be your colleague, your neighbor, spouse, child, parents, siblings, lovers, or even you.

 4 percent of ordinary people—one in twenty-five—has an often undetected mental disorder, the chief symptom of which is that that person possesses no conscience. He or she has no ability whatsoever to feel shame, guilt, or remorse. 

Martha Stout’s 13 Rules for Dealing with Sociopaths in Everyday Life