Includes bibliographical references and index.

"The purpose of this volume is to report the results of a collaborative, 20-month, interdisciplinary project on making tradeoffs across species. I'm the editor because I was the project lead. We aren't all joint authors because some people deserve credit for certain singular contributions. Still, the project was a joint enterprise with a specific, shared goal: to develop a way to make principled comparisons between courses of action that affect different kinds of animals. This book reflects our collective view about one way to achieve that goal. And it wouldn't exist without efforts that go well beyond the authorship details of particular chapters. So, all the contributors deserve more credit than the cover suggests"-- Provided by publisher.