The Unidroit Principles are a restatement of the law applicable to international commercial contracts that have been developed on the basis of an innovative comparison of the leading contract laws. As such, their authority rests on the standing of UNIDROIT, the institution responsible for their preparation, and on the quality of the rules they propose. This book provides a comprehensive in-depth analysis of the foundations of, and justifications for, an application of the Unidroit Principles. Its conclusion–that the Unidroit Principles may constitute a true governing law to be recognized by arbitral tribunals and domestic courts alike–will further contribute to the worldwide success of the Unidroit Principles.