This work explores in depth the legal consequences of peremptory norms.

Peremptory Norms of General International Law (Jus Cogens): Disquisitions and Dispositions is a collection of contributions on various aspects of jus cogens in international law.

The International Law Commission's Draft Conclusions on Peremptory Norms examines the ILC's Draft Conclusions on Peremptory Norms of General International Law. It provides a broader understanding of the Draft Conclusions and offers an analysis and evaluation of the legal issues and consequences raised by the Draft Conclusions.

Peremptory norms are non-derogable standards of international law which impose basic limits on how far governments, politicians, and diplomats can further their own goals. For example, certain core norms prohibit aggressive war and protect basic human rights. This is the first thorough examination of the theory and application of these norms.

Because of its unique nature, the sources of international law are not always easy to identify and interpret. This book provides an ideal introduction to these sources for anyone needing to better understand where international law comes from. As well as looking at treaties and custom, the book will look at more modern and controversial sources.

In Peremptory Norms of International Law and Terrorism (Jus Cogens) and the Prohibition of Terrorism, Aniel de Beer evaluates the role of peremptory norms of international law or jus cogens in the fight against terrorism.