Richard Haass describes the end American unipolarity:
Nonpolarity complicates diplomacy. A nonpolar world not only involves more actors but also lacks the more predictable fixed structures and relationships that tend to define worlds of unipolarity, bipolarity, or multipolarity. Alliances, in particular, will lose much of their importance, if only because alliances require predictable threats, outlooks, and obligations, all of which are likely to be in short supply in a nonpolar world. Relationships will instead become more selective and situational. It will become harder to classify other countries as either allies or adversaries; they will cooperate on some issues and resist on others. There will be a premium on consultation and coalition building and on a diplomacy that encourages cooperation when possible and shields such cooperation from the fallout of inevitable disagreements. The United States will no longer have the luxury of a "You're either with us or against us" foreign policy.