This volume is a collection of papers that advance our understanding of the metaphysics of powers — properties such as fragility and electric charge. The metaphysics of powers is a fast developing research field with fundamental questions at the forefront of current research, such as Can there be a world of only powers? What is the manifestation of a power? Are powers and their manifestations related by necessity? What are the prospects for dispositional accounts of causation? The papers focus on questions concerning the metaphysics of powers that cut across any particular subject-specific ontological domain -- whether philosophy of science, philosophy of mind, ethics, epistemology – investigating the metaphysical structure of powers, the nature of the manifestation of powers, the necessity or contingency of a power’s relation to its manifestations, and powers and causation. A number of authors also engage in discussion with Humean and neo-Humean treatments of causation, thereby making contributions to a larger metaphysical debate beyond powers. Additionally, the authors engage critically with the latest contributions to the debate on powers in the literature, thereby bringing together in a wholesome and analytical way the most recent and noteworthy theoretical developments in this research field.

George Molnar came to see that the solution to a number of the problems of contemporary philosophy lay in the development of an alternative to Hume's metaphysics. This alternative would have real causal powers at its centre. Molnar set about developing a thorough account of powers that might persuade those who remained, perhaps unknowingly, in the grip of Humean assumptions. He succeeded in producing something both highly focused and at the same time wide-ranging. He showed both that the notion of a power was central and that it could serve to dispel a number of long-standing philosophical problems. Molnar's account of powers is as realist as any that has so far appeared. He shows that dispositions are as real as any other properties. Specifically, they do not depend for their existence on their manifestations. Nevertheless, they are directed towards such manifestations. Molnar thus appropriates the notion of intentionality, from Brentano, and argues that it is the essential characteristic of powers. He offers a persuasive case for there being some basic and ungrounded powers, thus ruling out the reducibility of the dispositional to the non-dispositional. However, he does allow that there are non-power properties as well as power properties. In this respect, his final position is dualistic. This is contemporary metaphysics of the highest quality. It is a work that was almost complete when its author died. It has been edited for publication by another specialist in the subject, Stephen Mumford, who has also provided an introduction that will allow non-specialists to become acquainted with the issues. David Armstrong, one of the greatest living metaphysicians and personal friend of George Molnar, has provided a Foreword.

Systematic metaphysics is defined by its task of solving metaphysical problems through the repeated application of single, fundamental ontology. The dominant contemporary metaphysic is that of neo-Humeanism, built on a static ontology typified by its rejection of basic causal and modalfeatures. This book offers a radically distinct metaphysic, one that turns the status quo on its head. Starting with a foundational ontology of inherently causal properties known as "powers", Neil E. Williams develops a metaphysic that appeals to powers in explanations of causation, persistence,laws, and modality. Powers are properties that have their causal natures internal to them: they are responsible for the effects in the world. A unique account of powers is advanced, one that understands this internal nature in terms of blueprint of potential interaction types. After the presentationof the powers ontology, Williams offers solutions to broad metaphysical puzzles, some of which take on different forms in light of the new tools that are available. The defence of the ontology comes from the virtues of metaphysic it can be used to develop. Particular attention is paid to theproblems of causation and persistence, simultaneously solving them as is casts them in a new light. The resultant powers metaphysic is offered as a systematic alternative to neo-Humeanism.

Published in 2012, Powers and Capacities in Philosophy is a valuable contribution to the field of Philosophy.

The world is a complex place, and this complexity is an obstacle to our attempts to explain, predict, and control it. In Power and Influence, Richard Corry investigates the assumptions that are built into the reductive method of explanation - the method whereby we study the components of acomplex system in relative isolation and use the information so gained to explain or predict the behaviour of the complex whole. He investigates the metaphysical presuppositions built into the reductive method, seeking to ascertain what the world must be like in order that the method could work.Corry argues that the method assumes the existence of causal powers that manifest causal influence- - a relatively unrecognised ontological category, of which forces are a paradigm example. The success of the reductive method, therefore, is an argument for the existence of such causal influences.The book goes on to show that adding causal influence to our ontology gives us the resources to solve some traditional problems in the metaphysics of causal powers, laws of nature, causation, emergence, and possibly even normative ethics. What results, then, is not just an understanding of thereductive method, but an integrated metaphysical worldview that is grounded in an ontology of power and influence.

"This volume examines some of the main twists and turns in the fascinating history of the philosophical concept of powers or dispositions. It focuses on what one might call the metaphysical sense of 'powers'-that is, the powers that are invoked in the explanation of natural changes and activities. The volume's chapters discuss, among others, the philosophical views of Anaxagoras, Plato, Aristotle, the Stoics, Plotinus, Ibn Gabirol, Avicenna, Abelard, Anselm, Henry of Ghent, John Duns Scotus, René Descartes, Nicolas Malebranche, Gottfried Wilhelm Leibniz, Margaret Cavendish, Ralph Cudworth, Henry More, John Locke, David Hume, Thomas Reid, Mary Shepherd, Immanuel Kant, Georg Wilhelm Friedrich Hegel, David Lewis, David Armstrong, and George Molnar. In addition, the volume contains four short reflection essays that examine the concept of powers from the perspective of disciplines other than philosophy, namely, history of music, West African religions, history of chemistry, and history of art"--