Contributor(s): Dr Julian Baggini, Canon Dr Angus Ritchie, Dr Mark Vernon | Religious and secular philosophers have long debated whether ethics have an objective basis (moral realism) or a relative basis (moral relativism). But does theism or atheism offer a better basis for ‘moral realism’? A theist, an atheist, and an agnostic discuss. Julian Baggini is a writer, journalist and co-founder of The Philosophers’ Magazine. Angus Ritchie is director of the Contextual Theology Centre. Mark Vernon is a writer and journalist.