As Henry Kissinger observes in this magisterial book, there has never been a true world order. For most of history, civilizations have defined their own concepts of order, each one envisioning its distinct principles as universally relevant. Now, as international affairs take place on a global basis, these historic concepts of world order are meeting. Every region participates in questions of high policy in every other, often instantaneously — yet there is no consensus among the major actors about the rules and limits guiding this process, or its ultimate destination. The result is mounting tension. Blending historical insight with prognostication, World Order is a meditation from one of our era's most prominent diplomats on the 21st century's ultimate challenge: how to build a shared international order in a world of divergent historic perspectives, violent conflict, proliferating technology and ideological extremism.