Unipolar moments are usually brief unimoments. From Martin Sieff at strategic-culture.org:
American leaders, politicians, policymakers and pundits are fond of talking about the “Unipolar Moment” and “Hyper Power” position that they imagine the United States enjoys in the world.
Totally lacking from this fantasy are any inconvenient historical facts.
The US Unipolar Moment (insofar as it existed at all) lasted less than a decade from the break-up of the Soviet Union at the end of December 1991 to June 15, 2001. The US “moment” barely made it into the 21st Century.
On that epochal day of June 15, 2001, two major events happened. First, US President George W. Bush gave a speech in Warsaw pledging to integrate the three tiny Baltic states of Estonia, Latvia and Lithuania into NATO as a prime strategic goal of the United States.