In isolationist cultures allowing outsiders a visit or attain residence is the exception, not the rule. Outsiders in such cultures are met with distrust and fear.

Bonus: If you come from an isolationist culture, increase the dice sizes of one of your Physical skills to a d12, one of your Mental skills to a d10, any other skill to a d10, any two skills you want to a d8, and any three other skills to a d6.