A study of the philosophical problems associated with the concept of action. Professor Danto is concerned to isolate logically the notion of a ‘basic action’ and to examine the way in which context and intention, for example, can convert physiological movements into significant actions. He finds many suggestive parallels between the concepts - the logical architecture - of action and cognition and in developing this theme he becomes involved in and proposes new approaches to various long-standing problems connected with causality, determinism and materialism. As in his earlier books, Analytical Philosophy of History and Analytical Philosophy of Knowledge, Professor Danto places the discussion in a broad historical and philosophical perspective and brings to it a wide reading and an unusual range of interests. He is always prepared to venture novel ideas to stimulate further debate and research and the book as a whole is presented as an original contribution to a subject which is attracting increasing attention from philosophers and from psychologists with an interest in the conceptual assumptions behind their work.