A Conversion Bureau Story
Whether it be clothed in a velvet glove, or by the iron hoof it covered, Princess Celestia forced ponification onto mankind, allowing no choice for the species. Only a scant hundred million escaped her law, out of a total of seven billion, whether it be by their own hand, the hoof of an unfortunate pony, or the three million who managed to escape to space in pods that would never make landfall even in the off-chance they would encounter a viable planet. She was confident that all of the apes that had ruined this planet of Earth were either surely dead, or her little ponies.
Millennia later, she would receive a strange visitor from the stars, one that held an agenda that she didn't agree with, but that she herself had given precedence for.