I might be interested! Given that we're talking about the Southern USA just post the Louisiana Purchase and also making room for lots of fantasy/mythological elements from other stories, what's your world's take on the veracity of Native American myths and traditions, ala Navajo skinwalkers or Cherokee wendigo? Given that you've given many of your alternate races a shared biological ancestor, I'm assuming that you're trying to retain a scientific basis for the fantasy elements, but I see that you're placing it in an as-of-yet still "wild" territory so I was just wondering to what extent the line between magic and science is blurred in your world? If that makes sense...