Helmut Philipp Aust is a Senior Research Fellow at the Humboldt-Universität zu Berlin.

• 1. Introduction; 2. Complicity between bilateralism and community interest; 3. Complicity and the international rule of law; 4. Complicity in customary international law; 5. The concept of complicity in Article 16 ASR; 6. The consequences of complicity; 7. Complicity and aggravated responsibility; 8. A network of rules on complicity; 9. Concluding observations.

'It was high time for an academic treatment of this fundamental issue for the international legal order. A decisive contribution in this regard has now been made by Helmut Philipp Aust … The history, content, structure and international legal context of the norm are analysed by the author in a comprehensive and precise manner. This is also true for the conflicts between law, morals and politics which impact upon the development and interpretation of the rule on complicity. Aust takes the position of a carefully balancing pragmatist who clearly identifies international legal deficits, but refrains from moral rigour. In general, the book excels in its high relevance to practice.' Translated from the Frankfurter Allgemeine Zeitung