These collected essays deal with the evolutions and immutabilities of international society and international law during the last 25 years, a period during which these fields of study have undergone many changes. The starting point is that, far from operating at different levels or being in conflict, international law and politics are closely intertwined. The book addresses the many different aspects of international law: the role and concept of the State, and the position of States in the international system * the bases, principles, and evolution of public international law * questions of international security which still govern international relations * classic and current systems of peace and security maintenance * the standing, role, and actions of the UN Security Council * arms control and limitation of armaments * unilateral uses of armed force and the legality of war * humanitarian law and international criminal justice. The perspective of these essays is not a theoretical or dogmatic vision of international law and politics, but is based upon the practice of States in the international arena, and the way in which the guiding legal rules are elaborated and implemented. The essays were collected from various books and articles on international law and relations, written by Professor Serge Sur, an ad hoc judge at the International Court of Justice in The Hague.