How to qualify the United States’ attitude towards International Law? How is Humanitarian Law evolving? Does the concept of “failed states” make sense? Here are some of the numerous issues that Prof. Serge Sur raises in this book, which assembles articles published by the author during the past 25 years. An eminent professor of International Law and Relations at Panthéon-Assas University in Paris, France, Prof. Sur directs the Centre Thucydides, and is currently ad hoc judge at the International Court of Justice. Prof. Sur is also the author, with Prof. Combacau, of one of the most famous handbooks of International Law published in France. The translation of thirty-two articles he authored in this new volume of the French Studies in International Law thus offers, for the first time in English, an overview of the thought of one of the most respected French internationalists. Prof. Sur’s articles focus on four of the main issues of International Law and Relations, which are the four main parts of the book : States (Part I), International Legal System (Part II), International Security (Part III), and International Humanitarian Law and International Criminal Justice (Part IV). On those wide subjects, Prof. Sur’s point of view proves to be both classical and challenging.