This book examines an interesting and relatively understudied area of the evolution of the international rule of law and the role of professional ethics. The rule of law has been gradually developed and promoted at the national level over centuries, however at the international level it has only recently received (more in rhetoric than in implementation) support from a macro perspective - developments of international rules and institutions, and from a micro perspective - ethical codes, independence and un-bias of professionals, working in international organizations and tribunals. The book offers analysis and recommends policies to strengthen the rule of law at international level to meet a major global governance demand in ensuring equity, justice, stability and consistency in international affairs.