Or something less than human, I'd argue. In the same vein, a cancerous skin cell becomes a "supercell" and gets to live an immortal life, no longer constrained

Or something less than human, I'd argue. In the same vein, a cancerous skin cell becomes a "supercell" and gets to live an immortal life, no longer constrained to the cycle of death. I suspect that people don't like psychopaths for the same reason our bodies kill cancer cells: they aren't good for society. (some argue that in small numbers they can be, but you can't run a tribe of psychopaths). The specific mechanisms of people going against psychopaths include things like altruistic punishment: https://en.wikipedia.org/wiki/Third-party_punishment https://en.wikipedia.org/wiki/Third-party_punishment