Soveriegn, take your time. I'm not finished my NS, and I'm the GM, so what does that tell you?

Gorgen and Grave both have fair points. No-one has said they outright ban slavery, but no-one has said they endorse it either. It's a natural assumption, I suppose.
Torin, though, does ban slavery. Don't know about anyone else, but slaves are banned in my nation.