I realized recently that it's Karres from James Schmitz' The Witches of Karres-- good people, winterberry jelly, people generally can do magic, and the ability to get away from tyranny.
Russel's "...And Then There Were None" comes in second, but the society has less flavor, no magic, and escapes tyranny partly because it's a good place to live but also because the central government isn't trying very hard.
What's your favorite?
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