Transformation of Diplomacy in the Twenty-First Century: Reassessing Classical Diplomatic Theories in an Era of Transparency, Multilateralism, and Networked Governance Introduction Diplomacy has traditionally been regarded as the principal instrument through which sovereign states manage their external relations. Classical diplomatic theory, shaped by the evolution of the European state system following the , rested upon … Continue reading How far do recent trends in diplomatic practice challenge classical diplomatic theories based on secrecy, bilateralism, and state exclusivity?