Hussar
Legend
See, there's the problem I'm having. "Cut off except when they raid"? How can a society exist like this? That's not how it works. Neighbours trade and mix because that's what happens. Expecially when we're talking about societies of highly intelligent, virtually immortal individuals who spend considerable time rubbing shoulders with other intelligent races. Even if it's just slaves, that interaction affects things./snip can a nation of 50,000 drow living underground, cut off from the outside world except when they raid - can they almost all be evil?
Communication might be slower, of course, but, it still happens. And it happens a lot.
The whole mono-culture approach is just really hard to swallow.