Free Original Storyworld Ideas, Part 4: Future AI-Domesticated Breeds of Humans

What if the future holds a dictatorship of Artificial Intelligences (AIs) but they prove to be relatively benevolent? What if they created different "breeds" of humans, then disappeared, leaving humans on their own?

This sort of story would allow the author to show that no matter how different humans are from each other, we are still human--and our problem of sin isn't simply a product of a Darwinian struggle to survive.