Material Constitution has collected together many of the best and most important papers on the topic. This volume should find its way to the bookshelf of anyone working on the ontology of material objects. -- Mark Heller, Southern Methodist University A fine collection ... Rea's introductory essay is absolutely top-notch. -- Alvin Plantinga, University of Notre Dame It [will] be a well- and often-used collection for a long time to come. -- Ernest Sosa, Brown University