I don't think good and evil exists as such. I think there are just different methods for survival, some of them are more selfish than others. People learn those methods mostly as kids. Whatever methods works for them in their childhood environment, will remain in them as habits. There might be some genetic differences in some brain circuits on how reward or pleasure are induced, but brains are quite malleable, therefore its likely those circuits build up mostly as reactions to environment or as result of imitating people around, parents especially.<br><br>So there are just different ways of surviving, "good" ways, which gives positive impact on society, and "bad" ways which has bad impact on society. And those whose brain circuit is tuned for enjoying misery, will be seen as evil.,(reply>), Good point, it is also very relative as bad or good kinda social construction. Like animals eat each other and survive for millions of years, yet if human eats other human….might be a small problem there 😂