This book provides a historical, theoretical and practical background on public policy in dispute resolution with a focus on cross-border and transnational disputes. Farshad Ghodoosi argues that courts should adopt a more systemic approach to public policy while rejecting notions such as transnational public policy, which limits the application of those norms with mandatory nature. Contrary to the current trend, the book invites the reader to re-conceptualize the role of public policy, and transnational dispute resolution, in order to have more sustainable, fair and efficient mechanisms for resolving disputes outside of national courts. The book sheds light on one of the most important yet often-neglected control mechanisms of today’s international dispute resolution and will be of particular interest to students and academics in the fields of International Investment Law, International Trade Law, Business and Economics.