Given that the United States has not been playing much of a leadership role on many of these issues recently, it is worth taking a look at what happens when no one country exercises effective leadership. One set of answers might seem apparent from the collapse of international trade negotiations and the unraveling international system to control the spread of nuclear weapons.
鉴于美国最近在这些问题上并未发挥多大的领导作用，现在就值得观察一下在没有任何一个国家实施有效领导作用之际局面会是如何。其中一套答案从国际贸易谈判破裂以及国际体系无力制止核武器扩散来看就十分明显。事情会变得十分严峻。但是这还不是问题的全部。