But what motivates a psychopath to do what they do, and by that I mean everything they do? Anything from choosing a job, to deciding where to live, or whether to accept an invitation, or how to interact with the neighbors. We say they are motivated by self interest with no regard for the rights and sensibilities of others, but what are their self-interests? Are these as diverse as they are for the rest of us - everything from creature comforts, to wealth, to knowledge, to fun/excitement - or as I asked before, are psychopaths driven by the desire to hurt others for its own sake? If they are not, then the damage they do is essentially collateral, and not the object of their efforts. That neither excuses it nor diminishes its effects, but does suggest a different understanding of their motivations.