Moral dilemmas set a challenge for ethical theory. They are situations where agents seem to be under an obligation both to do, and to refrain from doing, a specific act. Are such situations possible? What is their exact nature? These are the questions that Moral Dilemmas tries to answer. The book argues that moral theories should not allow for the possibility of irresolvable dilemmas, for situations in which no right answer exists. To this end, arguments seeking to prove the existence of irresolvable dilemmas, especially the argument from the incommensurability of values, are discussed at...