We began writing this book when all three of us were working at the Centre for Applied Philosophy and Public Ethics (CAPPE) in Australia. We are grateful to CAPPE for material support for the project and for its stimulating intellectual environment. Our friend Stephen Nathanson provided insightful feedback at several points in the process of writing the book, and we received helpful comments from three anonymous reviewers. Steven Riley and Adam Henschke provided valuable research assistance. We are also grateful to Liam Cooper and Allison Kostka–our editors at Wiley Blackwell–for their encouragement and forbearance.