Thanks for reply. That makes more sense to me now. I agree with a fair amount of what you say. I think you'd have a sense from our previous discussions why I favour physicalist approaches to the morals of a FAI, rather than idealist or dualist, regardless of whether physicalism is true or false. So I won't go there. I pretty much agree with the rest.

EDIT> Oh just on the deep ecology point, I believe that might be solvable by prioritising species based on genetic similarity to humans. So basically weighting humans highest and other species less so based on relatedness. I certainly wouldn't like to see a FAI adopting the view that people have of "humans are a disease" and other such views, so hopefully we can find a way to avoid that sort of thing.