An easy way to recognize a psychopath has been revealed: just look at your hands. Scientists suggest that mental disorders may well have biological rather than social roots. It turned out that there is a clear connection between finger length and antisocial personality traits. You need to compare the length of the index and ring fingers. If the index finger is longer, then everything is fine. In short, there is a high probability of developing psychopathy, substance abuse and antisocial behav...