Psychopaths drive people to suicides and cause severe suffering to many in their lives and commit a disproportionate number of horrific crimes. I do not agree with the takes-all-kinds argument and seriously question the humanity of psychopaths. Roughly speaking, the human mind can be thought of consisting of a primitive or "lizard" layer of base needs including sexual lust and power, a human level consisting of empathy and the ability to form genuine social bonds, and an intellectual level responsible for abstract thought. A psychopath is one who only has the lowest and the highest levels of the three. In my opinion, they are intra-species predators and parasites best eradicated or cured if possible. But I do realize the practical and ethical problems in any attempt at doing so however well thought-out.