Many people and organizations have supported me in my research, especially with the parts of it presented in this book, and it is a pleasure to thank all those I can remember for their kind support, comments, and inspiration. First, my clever and dear colleagues of Philosophy and Science Studies at the University of Roskilde have always been willing to discuss the topics of this book. Among those colleagues, I would like to offer a special thank you to all the members of our Research Group for Criminal Justice Ethics. Our group has been fortunate to consist of philosophers like Fatima Sabir, Frej Klem Thomsen, Jakob v. H. Holtermann, Sebastian Holmen, Kasper Mosekjær, Rune Klingenberg, Sune Læggard, Ditte Marie Munch-Jurisic, Søren Sofus Wichmann, Jesper Ryberg, Kira Vrist Rønn, and Kasper Lippert- Rasmussen. Thanks to all those members who have read my work and made important comments at our monthly research meetings. Without your comments, this book would certainly contain many more errors than it does. I would like to acknowledge that Jesper Ryberg and Kasper Lippert-Rasmussen have been extraordinarily helpful in making many very valuable comments and suggestions about most chapters in this book. I wish every person could have the benefit of such clever, inspiring, and thoughtful colleagues and friends.