However, the habit to refer to the psychopathic behavior as morally insane is a wrong idea. Regardless of scientific discoveries, psychopathy is a disease which results in a physiological deficiency. Charles Manson, one of the most famous psychopaths, is enough to understand the role played by environmental factors in his upbringing and the rational off-key personality he developed through the years. As well as Ted Bundy, serial killing, rape, stealing all these types of heinous crimes may be done by someone who seems to be normal, but in actuality this person may be very sick. There are people in the world today who wear masks and pretend to be something they are not. These people are psychopaths. Psychopaths fit in to society with the public not knowing what are capable of. What is it that causes people to become