Don't look for serial killers.. one in 25 of the people around you is a psychopath, hiding and living a secret life. Psychopaths take what they want, using their charm and wits.
They feel only the emotions of a predator. Pieter Hintjens has spent years building on-line communities and helping others to work better together. He is an expert in the dynamics of group psychology. He has researched cults and abusive manipulation since 2000, and psychopaths since 2010. He is also a software programmer, musician, and father.