Christopher J. Austin is a Postdoctoral Research Fellow in the 'Mistakes in Living Systems: A New Conceptual Framework for the Study of Purpose in Biology' project at Reading University. His specialisation is in Metaphysics and Philosophy of Science. He is the author of Essence in the Age of Evolution: A New Theory of Natural Kinds (Routledge, 2018).

Anna Marmodoro holds the Chair of Metaphysics in the department Philosophy of Durham University, and she is concomitantly an Associate Member of the Faculty of Philosophy of the University of Oxford. She specializes in two research areas: metaphysics, and ancient, late antiquity and medieval philosophy. Her latest monograph is Forms and Structure in Plato's Metaphysics (2021).

Andrea Roselli has been part of the Oxford-based Mereology of Potentiality research group for the last three years, while being a postdoctoral research associate at Durham University. He is specialised in Metaphysics, Philosophy of Science, Philosophy of Time.

Introduction Christopher J. Austin, Anna Marmodoro, and Andrea Roselli Part 1: Parts of Powers 1. Carving up the Network of Powers A.J. Cotnoir 2. Parts and Grounds of Powers: A Logic and Ground-Theoretic Mereology for Power Ontologies Robert C. Koons 3. Complex Powers: Making Many One Christopher J. Austin 4. Powers as Mereological Lawmakers Michael Traynor 5. Determinable Dispositions Nick Kroll Part 2: Composition of Powers 6. What There Is and What There Could Be: Mereology, Causality, and Possibility in an Ontology of Powers Sophie R. Allen 7. What Can Causal Powers do for Interventionism? The Problem of Logically Complex Causes Vera Hoffmann-Kolss 8. Collective Powers Xi-Yang Guo and Matthew Tugby 9. The Special-Power Composition Question and the Powerful Cosmos Joaquim Giannotti 10. The Composition of Naïve Powers Michele Paolini Paoletti Part 3: Power Mereology in Science 11. Quantum Dispositions and the Simple Theory of Property Composition Matteo Morganti 12. Dispositions, Mereology and Panpsychism: The Case for Phenomenal Properties Simone Gozzano