The period foregrounds how evolving international institutional architecture shapes constitutional order, with attention to security governance decisions, potential global court review, and inter-organ competences. It analyzes the reconfiguration of sovereignty in the post-Cold War era, including waning prerogatives, unification, and the internationalization of domestic law, alongside the emergence of cross-border normative arrangements. It traces the growth of international criminal justice and procedural governance through the drafting of a global court statute and histories of international judicial processes, while engaging normative frameworks—democracy, human rights, and ethnicity—and the relativity of norms driving legitimacy. Historical Significance: The era witnessed the maturation of international courts and transnational regimes as central actors, transforming the architecture of international order and prompting reevaluation of sovereignty and legitimacy. The cross-border diffusion of judicial power and the rise of procedural governance left a lasting imprint on subsequent constitutional theory and practice.