“In the following pages I argue that we have both philosophical and scientific reasons to doubt the adequacy of this widely accepted doctrine of materialism. In the history of Western philosophy, as we will see, it has turned out to be notoriously difficult to formulate a viable concept of matter. And physics in the twentieth century has produced weighty reasons to think that some of the core tenets of materialism were mistaken. These results, when combined with the new theories of information, complexity, and emergence summarized elsewhere in this volume, point toward alternative accounts of the natural world that deserve careful attention and critical evaluation.”