The aim of this book is to defend the Emotive Theory of Ethics, and, in particular, the versions of that theory proposed by A. J. Ayer in Language, Truth and Logic (1936) and by C. L. Stevenson in Ethics and Language (1944). For those readers who are familiar with the conventional history of Twentieth Century moral philosophy and the infamous place which the Emotive Theory occupies in that history, the question which may well spring to mind at this...