Two or more wrongs make a right? – The evolution of the customary right of self-defence in the post 9/11 era, and the effect of ‘unlawful' state behaviour on the formation of custom on the right of self-defence against non-state actors

The attacks of 9/11 constitute a crucial point in the development of the right of self-defence against a non-state actor in customary international law. More and more states used force against non-state actors while claiming their right of self-defence in the post-9/11 era. Situations such as the US...

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