The United States needs to redefine its role in world affairs, what does that mean and what will it take?

The liberal rules-based international order it built and sustained in the years after the Second World War is disintegrating at an accelerating pace. 

After a period of comity following the end of the Cold War, great-power competition has returned with a vengeance, pitting the United States against two major revisionist powers, China and Russia, meanwhile, smaller powers cozy up to one or multiple members of this unfriendly trio.