For the last 20 years, it has been my privilege to call Harvard Law School my professional home. Over that period, I have enjoyed teaching and learning from thousands of brilliant students on their way to positions of infl uence. For much of that time, my energies have been aimed at constructing an interdisciplinary bridge between legal theory and psychology. Since 2006 I have directed the Project on Law and Mind Sciences (PLMS) at Harvard Law School. It has been an eventful period in both law and the mind sciences, and mine has been an extraordinary vantage point from which to witness the push and pull of legal theory, social science, law, policy ideology, and politics. In 2007, 2008, and 2009, PLMS hosted conferences that brought together many of the world’s most thoughtful and distinguished mind scientists and legal scholars to examine and discuss the relationships between psychology and law. This book is a byproduct of those symposia; in fact, the majority of its contributors participated at one or more of those conferences. I am, of course, deeply indebted to all of those participants and contributors. Much of the behind-the-scenes work for those conferences and this book was done by teams of talented, devoted Harvard Law students. For example, in the spring of 2009, I taught a seminar in which students served as de facto co-editors of the book—helping with everything from soliciting contributions to editing preliminary chapter drafts. They were Emma Barratta, Kate Bowers, Sarah Boyette, David Brown, Brennan Calinda, Christine Demana, Katherine Gaudry, Al Green, Kelsey Israel-Trummel, Anthony Kammer, Lauren Kaplin, Jonathan Kane, Marco Lopez, Michael Rozensher, Jamie Wicks, and especially Naomi Reed. Working with those students was one of the most fruitful and enjoyable teaching experiences of my career, and I am deeply indebted to them for their devotion and contributions to the project.