[Edi]

I expect evil to be defined here as a culture of excessive cruelty and practicing the kind of things that would be abhorrent from a humanist point of view (human sacrifice, slavery etc etc). There are several nations in all eras that fit the definition of evil by those standards. The thing is, most of the nations are not evil as such, but can be depending on what sort of god they would follow. But take EA and LA Mictlan, LA Ermor, R'lyeh in all eras, Lanka, Yomi, Shinuyama and LA Marignon to name just a few, those an be considered directly evil.