I am doing a research for a character for a short story and wanted to ask for your help. What philosophy would you think would attract a psychopath/sociopath the most? And why?
Ethical egoism with a libertarian bent.
Also, check out some Ayn Rand and Anton LaVey.
Do you really think you can classify EITHER psycho-or sociopathy like that? I'm not going to go further into the fact that you seem to use those two terms indiscriminately like they're the same. Use your brain, man.