Four-Dimensionalism: An Ontology of Persistence and TimeLucid, absorbing, and original, this book defends the theory that the material world is composed of temporal as well as spatial parts. Along the way, it addresses many topics on the metaphysics of time and identity. These include the status of past and future objects, the nature of motion and change, the existence of composite objects, and examples involving two things in the same place at the same time. Author: Theodore Sider Publisher: Clarendon