We want ethics for a number of reasons, first and foremost, we want society to function. Therefore, we need ethics only in light of wanting society to function. To me this seems like a sufficient enough foundation for ethics, from which we can extrapolate moral principles when confronting a situation involving moral action.
This puts me in a tough spot because I don't think this necessarily leads to animal rights or vegetarianism.
This puts me in a tough spot because I don't think this necessarily leads to animal rights or vegetarianism.