摘要：The source of validity of Public International Law —the reason why international norms are legitimate and mandatory— has been discussed by philosophers and internationalists with no reachable consensus. Nonetheless, there is a contemporary tendency towards favoring Objectivist narratives, which believe that any source is suprapositive, beyond State will. This article defends Vereinbarung, in other words, the Collective Will of States, as the only narrative able to support the legitimate obligatoriness of Public International Law norms, regardless of necessary amendments.
关键词：fundamento do direito internacional público; voluntarismo; Triepel.
