Is There a Better Moral Theory or Utilitarianism?

Peter Singer: I'm becoming less and less convinced that there a clear, crisp set of rules or principles we can write down. And i think that's compatible with the idea that we are constructivists. So to attribute perfect clarity and precision to the outcome is probably a mistake in some way. In a single world cosmology, where things only happen once, and we all agree what those things are, then it makes sense to talk about the life of an individual person as constituting a coherent self, right?