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Max Planck Encyclopedia of Public International Law [MPEPIL]

Use of Force, Prohibition of

Oliver Dörr

From: Oxford Public International Law (http://opil.ouplaw.com). (c) Oxford University Press, 2023. All Rights Reserved.date: 21 May 2024

Use of force, prohibition — Armed attack — Peace treaties — Humanitarian intervention — Act of state

Published under the auspices of the Max Planck Institute for Comparative Public Law and International Law under the direction of Professor Anne Peters (2021–) and Professor Rüdiger Wolfrum (2004–2020). 

1 The prohibition of the threat or use of force constitutes one of the cornerstones of the modern international legal order. Besides being laid down explicitly in Art. 2 (4) United Nations Charter (‘UN Charter’) and referred to in many other treaties, it is today universally accepted as a norm of customary international law. Moreover, it is agreed by many to belong to the special category of international ius cogens, which gives expression to the fundamental importance of the prohibition, as well as to its general acceptance by the international community. In the...
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