Quote Originally Posted by Bohandas View Post
I don't think planets of hats are necessarily unrealistic. The seperareness of cultures is a doomed relic of pre-information-age society. In time, and barring some great catastrophe, they will eventually all merge into one culture.
More significant perhaps is the fact that alien lifeforms would likely be incredibly different from us, so much so that they might seem uniform to us. All the distinctions between earth human cultures are probably pretty small and difficult for aliens to distinguish, I'd wager.