Based on all criteria - military power, economic influence, cultural dominance - America remains number one, even though other, new players are increasingly challenging it in that role.
Robert KaganIn my view, America has never had the opportunity to enter paradise. Europe enjoys the paradise it enjoys, in part because the United States provides the overall security that allows Europe to live in a system where military power is not a major issue.
Robert KaganInternational order is not an evolution; it is an imposition. It is the domination of one vision over others- in this case, the domination of liberal free market principles of economics, democratic principles of politics, and a peaceful international system over other visions that other nations and peoples may have. It will last only as long as those who favor it retain the capacity to defend it.
Robert KaganI think most Americans believe that although it's better not to use military force if you can avoid it, that the world simply doesn't provide us the luxury of giving away military force as an important tool of foreign policy.
Robert Kagan