Acknowledgments are compelled. The thoughts and contributions of the authors’ students at NYU, Emory, and the University of Navarra, where the authors now teach, and of the University of Miami School of Law, where the authors taught for eight years, have played a decisive role in the writing of this text. They have taught us more than we ever will fully comprehend. Special gratitude is extended to John Berger, senior editor at Cambridge University Press, who supported and believed in this project and without whom this work would not have been possible. Tutor (ret.) Nicholas Maistrellis of St. John’s College, Annapolis, helped the authors navigate the deliciously treacherous waters of the Attic Greek in the effort to find the earliest Western expression of public purpose in an interstate context. He was patient and generous with us. David D. Caron, Dean of the Dickson Poon School of Law, King’s College London, was sufficiently gracious to accept the authors’ invitation to write a prologue. The Foreword alone justified the writing of the book. The authors appreciate his contribution and valuable insight. Michael H. Graham, professor of law and Dean’s Distinguished Scholar for the Profession at the University of Miami School of Law, offered extremely valuable suggestions, particularly regarding the text’s structural organization. Professor Franco Ferrari, director of the Center for Transnational Litigation, Arbitration, and Commercial Law at New York University School of Law, demonstrated that there is such a thing as infinite patience residing within finite human beings. Professor Ferrari spent more weeks than anyone would care to admit focusing on the authors’ use of the “decisional law of international investor-state arbitration.” His input was central to this effort.