This book has benefited from generous comments and discussions with numerous friends and colleagues who have read all or parts of it: Sivan Agon-Shlomo, Reuven Avi-Yonah, Eduardo Baistrocchi, Philip Baker, Yitzhak Benbaji, Jean-Pierre Benoit, Eyal Benvenisti, Pamela Bookman, Yariv Brauner, Kim Brooks, Allison Christians, Steven Dean, Ana Paula Dourado, Adi Ayal, Ron Davies, Yuval Feldman, Talia Fisher, David Gilo, Ofer Grosskopf, Assaf Hamdani, Werner Haslehner, Martin Hearson, Michael Heller,Mindy Herzfeld, Peter Hongler, Roy Kreitner, Tamar Kricheli-Katz, Adi Libson, Assaf Likhovski, Doreen Lustig, Tali Margalit, Yoram Margalioth, Ruth Mason, Ajay Mehrotra, Irma Mosquera, Jacob Nussim, Lisa Philipps, Pasquale Pistone, Katharina Pistor, Gabriel Rauterberg, Tali Regev, Diane Ring, Adam Rosenzweig, Ian Roxan, Steve Shay, Miranda Stewart, Max Stearns, Linda Sugin, Edoardo Traversa, as well as anonymous referees of CambridgeUniversity Press and the Israeli Science Foundation.