Luna had ruled over Equestria for many years, using her abnormally long life to gently guide her sister's kingdom from empire to constitutional monarchy to democracy. At which point, the citizens rushed to vote her in as president.
Again. And again. And again. Until, generations later, even the vote itself had become an empty formality.
Then, one day, without warning or explanation, Luna abruptly resigned from the most powerful position in the world. But while she packed, her formerly royal bedchambers flooded with an invisible mist.
She awoke in her own bed in an alien place. A place where no one ever used names, disobeyed the rules, or did anything unexpected.
A place that was perfectly safe, perfectly sane, beneath the equals-sign banner of Our Village.
Inspired in part by A Shimmer of Hope, by Dawn Swordspony. Please check it out, it’s a great story.
Trigger warning for manipulative bastards getting into people's heads, figuratively and otherwise, and for mental damage.
(And if you haven't seen the original Prisoner series in its entirety, you're cheating yourself out of one of the best TV programs ever made.)