Mary Kaldor's "New and Old Wars" has fundamentally changed the way we understand contemporary war and conflict. In the context of globalization, this path-breaking book has shown that what we think of as war - that is to say, war between states in which the aim is to inflict maximum violence - is becoming an anachronism. In its place is a new type of organized violence which could be described as a mixture of war, organized crime and massive violations of human rights. The actors are both global and local, public and private. The wars are fought for particularistic political goals using tactics of terror and destabilization that are theoretically outlawed by the rules of modern warfare. Kaldor's analysis offers a basis for a political response to these wars, in which international peacekeeping is reconceptualized as cosmopolitan law enforcement.