Robert Kagan gives us a picture of the world today in all its complexity and its simplicity. This is a world where America is dominant but cannot dominate, where the struggle for power and prestige goes on as it always has. Power is at the service of ideas, but the key ideas are also ideas about power: democracy and autocracy. All this in a hundred pages, with style, energy and panache.

—英国政坛大佬Robert Cooper的评价