The warning signs seem to be everywhere. A resurgent Russia is exerting its power in Eastern Europe and the Middle East. A rising China is extending its reach across its periphery. ISIS has taken control of large parts of Iraq and Syria. Establishment Democrats and Republicans couldn’t even stop Donald Trump from becoming the president of the United States.

For the foreign policy establishment in Washington, it all raises a very troubling question: is the United States an empire in decline?

Some insist that the answer is yes — that the period of US global dominance that has reigned since the end of the Cold War is coming to an end. As things now stand, “the post–Cold War, unipolar moment has passed,” the National Intelligence Council reported earlier this year. Former CIA officials John E. McLaughlin and Gen. David H. Petraeus made a similar assessment before the House Armed Services Committee this past February. In the years ahead, McLaughlin argued, “the world will be without a hegemonic power — that is, without a country so powerful as to exert dominant influence and advance policy with little reference to others.” Petraeus agreed, saying that the post–Cold War era of “US domination of the world” is ending.