Beyond the Grundnorm:

static and dynamic legitimacies of international norms

Resumen

This contribution aims to add arguments to the hypothesis that the basic norm of Hans Kelsen's Pure Theory of Law is inapplicable as the sole foundation of the legitimacy of international law. Legitimacy is understood here as the property of the norm to attract international actors (Subjects of International Law) toward fulfilling the normative command. The basic norm of Hans Kelsen's Pure Theory of Law can be seen as a static element of the legitimacy of norms of international law. The fragmentation and interdependence between norms of international law can be seen as dynamic legitimacy elements. These arguments make up a theoretical set that seeks to explain why and how subjects of international law obey rules of law at the international level. The methodology of this contribution consists of qualitative theoretical research using primary sources referring to the issue of legitimacy in international law.