'Unlawful' war on Iran: 'Use of force by the United States never justified'

AFP / France 24
by FRANCE24
April 8, 2026
3 min read

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Professor Marc Weller asserts any U.S. use of force against Iran would be an unlawful act of aggression.

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Professor Marc Weller, Director of the Global Governance and Security Centre and Programme Director of the International Law Programme at Chatham House, asserts that any use of force by the United States against Iran would constitute an unlawful act of aggression. Weller argues that such actions, particularly threats against civilian infrastructure, represent clear violations of international humanitarian law. This perspective suggests a potential erosion of the international order if the United States were to engage in military action against Iran. His analysis highlights significant concerns regarding the legality and ethical implications of potential US military intervention.

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