Better never to have been believed: Benatar on the harm of existence: Campbell brown

In Better Never to Have Been, David Benatar argues that existence is always a harm. His argument, in brief, is that this follows from a theory of personal good which we ought to accept because it best explains several???asymmetries???. I shall argue here that Benatar's theory suffers from a defect which was already widely known to afflict similar theories, and that the main asymmetry he discusses is better explained in a way which allows that existence is often not a harm.