Erika de Wet, ‚Entrenching International Values through Positive Law: The (Limited) Effect of Peremptory Norms’, in: Heike Krieger & Andrea Liese, Tracing Value Change in the International Legal Order (OUP, 2023).
Abstract:
In this Chapter, Erika de Wet addresses the overall theme of value change from a legal perspective by analysing the effect of peremptory norms of international law (ius cogens). These norms are hierarchically superior to other legal norms and protect fundamental values of the international community. Taking a critical approach to the concept, she stresses that substantial legal effects of ius cogens have remained limited because states or courts seldom rely on the concept. She, therefore, doubts that ius cogens can shield norms or the underlying values from erosion and offers an explanation why legal norms may erode.
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