Action and Reaction in the World SystemThis book occupies the same niche as Raymond Arons 1962 classic, Peace and War: A Theory of International Relations. While Aron wrote during the Cold War, Thierry de Montbrial writes about the post Soviet international system, a system that is multipolar, ideologically heterogeneous, and therefore highly unstable. In this book, de Montbrial lays the foundation for a praxeology, or a science of action, to facilitate a better understanding of the