To introduce Bruno Simma to the readers of German Law Journal is both an easy and a difficult task. An easy one because it will hardly be necessary to introduce his writings to those who have done only the slightest research in public international law– from his textbook “Universelles Völkerrecht” of 1976, co-authored with his teacher and mentor Alfred Verdross and still widely cited in German literature and jurisprudence, to the Commentary of the Charter of the United Nations which he first edited (in German) in 1991, the second English edition of which was published last year by Oxford University Press. On the other hand, writing on Bruno Simma is a difficult task because many of you will already have got a personal impression already – meeting him in Munich, where he has been teaching international and European law for no less than thirty years, in Ann Arbor/Michigan, where he is member of the affiliate overseas faculty of the University of Michigan Law School (since 1997) after teaching there for more than ten years, or at the Academies in The Hague or Florence, where he has taught much-acclaimed and -cited lectures on the move of international law “from bilateralism to community interest” and the relationship between human rights law and general international law. An even broader audience has come to know him for his public appearances in the press, the radio or television, in particular for his characterization of the dilemma of the Kosovo intervention as a “thin red line” between legality and morality. His article on “NATO, the UN and the Use of Force” appeared on the Webpages of the European Journal of International Law – the leading European international law journal he co-founded in 1990 and still co-edits – even before the first shots were fired.