A Metaphysics for Freedom argues that agency itself-and not merely the special, distinctively human variety of it-is incompatible with determinism. For determinism is threatened just as surely by the existence of powers which can be unproblematically accorded to many sorts of animals, as by the distinctively human powers on which the free will debate has tended to focus. Helen Steward suggests that a tendency to approach the question of free will solely through the issue of moral responsibility has obscured the fact that there is a quite different route to incompatibilism, based on the idea that animal agents above a certain level of complexity possess a range of distinctive 'two-way' powers, not found in simpler substances. Determinism is not a doctrine of physics, but of metaphysics; and the idea that it is physics which will tell us whether our world is deterministic or not presupposes what must not be taken for granted-that is, that physics settles everything else, and that we are already in a position to say that there could be no irreducibly top-down forms of causal influence. Steward considers questions concerning supervenience, laws, and levels of explanation, and explores an outline of a variety of top-down causation which might sustain the idea that an animal itself, rather than merely events and states going on in its parts, might be able to bring something about. The resulting position permits certain important concessions to compatibilism to be made; and a convincing response is also offered to the charge that even if it is agreed that determinism is incompatible with agency, indeterminism can be of no possible help. The whole is an argument for a distinctive and resolutely non-dualistic, naturalistically respectable version of libertarianism, rooted in a conception of what biological forms of organisation might make possible in the way of freedom.

One of the most exciting developments in philosophy in the last fifty years is the resurgence in the philosophy of action. The concept of action now occupies a central place in ethics, metaphysics and jurisprudence. This collection of original essays, by some of the most astute and influential philosophers working in this area, covers the entire range of the philosophy of action. Topics covered include the nature of actions themselves; how the concepts of act, agent, cause and event are related to each other; self-knowledge, emotion, autonomy and freedom in human life; and the place of the concept of action in criminal law. The volume concludes with a major essay by one of America's leading authorities in the philosophy of law on 'the 3.5 billion dollar question': was the destruction of the World Trade Center one event or two?

Helen Steward puts forward a radical critique of the foundations of contemporary philosophy of mind, arguing that it relies too heavily on insecure assumptions about the nature of some sorts of mental entities it postulates - the nature of events, processes, and states. She offers a fresh investigation of these three categories, clarifying the distinction between them, and argues specifically that the assumption that states can be treated as particular, event-like entities has been a huge and serious mistake. Steward argues that the category of 'token state' should be rejected, and develops an alternative way of understanding those varieties of causal explanation which have sometimes been thought to require an ontology of token states for their education. She contends that many current theories of mind are rendered unintelligible once it is seen how these explanations really work. A number of prominent features of contemporary philosophy of mind - token identity theories, the functionist's conception of token role, a common form of argument for eliminative materialism, and the structure of the debate about the efficacy of mental content- are impugned by her arguments. Steward concludes that the modern mind-body problem needs to be substantially rethought.