Dear Philosophers (and especially Prof. Pogge),
I can see why an empirical theory of DESCRIPTIVE ethics is possible, but can there be an empirical theory of NORMATIVE ethics? It seems to me that, in the final analysis, you cannot deduce "ought" from "is".
If all people are born (have evolved) to be selfish and cruel, does it follow that we should be selfish and cruel? Shouldn't we be considerate and kind, even if we are not born with these attributes?