In this book, originally published in 1912, nine years after Principia Ethica, G. E. Moore intended to state and distinguish from one another the most important of the differing views which are held on some fundamental questions of moral philosophy, and in particular to consider whether any characteristic belongs in common to all good things and all right actions. It therefore moves on from the attempt in the earlier book to identify Goods to the discussion of such concepts as obligatoriness and free will. A valuable introduction for any student of moral philosophy, it is, with Principia Ethica, indispensable for the consideration of G. E. Moore's contribution to the subject.